Periodic table Essays & Research Papers

Best Periodic table Essays

  • Why Is the Periodic Table Periodic
    CIS Chem 12/10/12 Unnecessary Title that’s bold, italicized, and underlined. The periodic table is a chart of elements set up on the bias of atomic numbers, chemical properties, and their electron configurations. The elements of this chart are organized in families/groups and periods. The word periodic refers to the way the table is ordered, which is in periods and families/groups, and it looks like this: The green ones are the non-metals, the blue ones are alkali metals, the...
    296 Words | 1 Page
  • Periodic Table - 2111 Words
    CHAPTER 5: PERIODIC TABLE Development of the Periodic Table • i) Substance exist: naturally in elemental form Example: Gold, Uranium as unstable compound Example: Radioactive compounds as stable compound (majority) How to know whether a substance is a compound OR an element? ii) iii) • • • Grouping system: 1800: 31 elements identified 1865: 63 elements identified Audi Majdan – DMC 101 – KLIUC 1 • Dmitri Mendeleev: i) ii) iii) iv) Develop a system to...
    2,111 Words | 17 Pages
  • The Periodic Table - 1433 Words
    Table Of Contents The Periodic Law…………………………. 1. What Are Elements?..………………………2. Groups/Periods……………………………. 3. Electrons………………………………....... 4. The Families………………………………. 5. Metals/Non-Metals/Metalloids……………. 6. Ionization Energy………………………….. 7. Electronegativity…………………………... 8. Ionic/Atomic Radius………………………. 9. The Octet Rule……………………………. 10. Glossary………………………………........11. The Periodic Law The modern periodic table, based on atomic number and electron...
    1,433 Words | 7 Pages
  • The periodic table - 1490 Words
    THE PERIODIC TABLE HISTORICAL BACKGROUND The idea that all things are elements or combinations of elements can be found in the writings of the ancient Greeks and other early peoples. Although this idea may seem simple, it is very difficult to decide if a substance is indeed an element or a compound. There were twelve chemical elements discovered in ancient times, but it was not known that they were elements. Another 76 elements were discovered between 1557 and 1925. Many mistakes were made...
    1,490 Words | 9 Pages
  • All Periodic table Essays

  • Periodic Table - 6501 Words
    Explore key information about the chemical elements through this periodic table | Group | 1 | 2 | | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | Period | | 1 | 1H1.008 | | 2He4.0026 | 2 | 3Li6.94 | 4Be9.0122 | | 5B10.81 | 6C12.011 | 7N14.007 | 8O15.999 | 9F18.998 | 10Ne20.180 | 3 | 11Na22.990 | 12Mg24.305 | | 13Al26.982 | 14Si28.085 | 15P30.974 | 16S32.06 | 17Cl35.45 | 18Ar39.948 | 4 | 19K39.098 | 20Ca40.078 | | 21Sc44.956 | 22Ti47.867 | 23V50.942 |...
    6,501 Words | 22 Pages
  • Periodic Table and Valence Electrons
    Name _________________________________________ Date _________________________ Period ____ Homework Chapter 7: Electronic Structure of Atoms Exercises: Sections 7.4, 7.5 : Ionization Energy and Electron Affinities 1. Write equations that show the process for (a) The first two ionization energies of gallium; first: Ga(g) → Ga+(g) + 1 e– second: Ga+(g) → Ga2+(g) + 1 e– (b) the fourth ionization energy of rhodium. fourth: Rh3+(g) → Rh4+(g) + 1...
    923 Words | 6 Pages
  • History of the Periodic Table of Elements
    Abstract Gold, silver, copper, lead, and mercury are some of the ancient elements. Hennig Brand discovered phosphorus the first element. After the discovery of phosphorus, many more elements were discovered. Johann Dobereiner discovered that elements could be grouped in three sets and proposed the Law of Triads. Later, A.E.Beguyer de Chancourtois arranged the elements according to their atomic mass and created the first geometrical representation of the periodic table. John Newlands proposed...
    1,145 Words | 4 Pages
  • Development of the Periodic Table - 999 Words
    DEVELOPMENT OF THE PERIODIC TABLE Although Dmitri Mendeleev is often considered the "father" of the periodic table, the work of many scientists contributed to its present form. Elements such as gold, silver, tin, copper, lead and mercury have been known since earliest times. In 1649 the first scientific discovery of an element occurred. Hennig Brand, a German chemist, treated urine to a series of processes that resulted in the production of the element phosphorus. Over the next 200...
    999 Words | 3 Pages
  • Periodic Table Research Task
    Periodic Table Research Task By Kevin Shaji Part A. You are to research the task below and submit as a written piece of work i) John Dalton proposed his atomic theory in 1808. Outline his theory. (4 marks) ii) Explain which part of Dalton’s atomic theory was later found to be incorrect. (3 marks) iii) Dalton developed a way to measure the relative atomic mass of the different elements. Using examples research and describe the meaning of the term ‘relative atomic mass’. (3 marks)...
    2,751 Words | 8 Pages
  • History of the Periodic Table - 476 Words
    HISTORY OF THE PERIODIC TABLE How did the periodic table develop? Since a very long time, elements such as gold, silver, tin, copper, lead and mercury have been known. But the concept of elements have largely be changed since then. Many scientists did research and new scientific discoveries were found. The progress of science never ends. Lavoisier In 1789, French chemist Antoine Laurent Lavoisier discovered that an element is a fundamental substance that could not be broken down by...
    476 Words | 2 Pages
  • Periodic Table Research Paper
    Aaron Wong History and Development of the Periodic Table Period 11 The most basic arrangement of the periodic table was in 1649. By this time, many elements have been known but the first scientific discovery of an element was in 1649. Hennig Brand discovered phosphorus, the first element discovered through scientific inquiry. He attempted to create a Philosopher’s Stone which was supposedly able to turn metals into pure gold. During his experiment, he...
    879 Words | 3 Pages
  • The Development of Periodic Table - 628 Words
    The development of Periodic Table Elements such as gold and silver have been known since the earliest times. In 1649, a German alchemist, Hennig Brand made the first scientific discovery of an element, phosphorous. In the next 200 years, knowledge about the properties of elements and their compounds was gained. By 1869, 63 elements had been discovered in total. Scientists began to categorise those elements according to the similarities of their physical and chemical properties, which become...
    628 Words | 2 Pages
  • Contributors of the Periodic Table of Elements
    Contributors of the Periodic Table of Elements The First International Congress of Chemists took place in September 1860 in Karlsruhe, Germany to review scientific matters that there was little agreement to. Following this congress led to the development of the periodic table of elements. Top contributors to the periodic table included Staislao Cannizzaro, Dmitri Mendeleev, Henry Gwyn-Jeffreys Moseley, John William Strutt, William Ramsay, Friedrich Ernst Dorn, and Glenn Seaborg. Stanislao...
    456 Words | 2 Pages
  • Periodic Table and Metallic Character
    CBSE TEST PAPER-02 CLASS - X (Periodic classification of elements) 1. 2. Which of the following has maximum atomic size? (a) K (b) Ca (c) Al (d) P The law of octaves was proposed by (a) Newland (b) Doberiener (c) Lother Meyer (d) Mendleeve The number of periods in the long form of the periodic table is (a) 6 (b) 7 (c) 10 (d) 18 Which of the following elements has maximum metallic character? (a) Li (b) N (c) Na (d) P Which of the following is the most reactive halogen? (a) F (b) Cl (c) Br (d) I...
    354 Words | 2 Pages
  • Changing of the Periodic Table - 438 Words
    Joy Jenkins Changing of the periodic table Today, the periodic table organizes the elements in horizontal rows, or periods, by order of increasing atomic number. The elements are also organized in vertical columns, or groups, based on similar physical characteristics and chemical behavior. I believe the periodic table will continue to evolve as new elements are discovered. One of the earliest attempts to organize the elements based on their chemical and physical properties was made by...
    438 Words | 2 Pages
  • Development of the Periodic Table - 2342 Words
    It’s a rarity that we should come across a laboratory, classroom, chemistry textbook or lecture theatre that doesn’t contain a periodic table of the elements. It required the immense research and determination of the scientist Dmitri Mendeleev to show us that all elements followed a natural form and provided us with the first decent periodic table. There are 111 elements recognised today by IUPAC and they are arranged in the periodic table in horizontal groups and vertical periods. The eight...
    2,342 Words | 6 Pages
  • Elements of Periodic Table Trivia
    Janelle C. Gajardo IV-1 Mrs.Dimacutac December 5, 2011 Elements in the Periodic Table Trivia l Actinium (Ac) - radioactive element found in uranium ores, used in equilibrium with its decay products as a source of alpha rays.The name originates from the Greek word 'aktinos' meaning ray or beam. l Argon (Ar) - they don't often interact with other elements. This caused early mappers of the periodic table, such as Dmitri Mendeleev, to think of them as proud and noble. l Carbon (C) - can...
    1,209 Words | 4 Pages
  • Who Invented The Periodic Table
    Who invented the periodic table? Dmitri Mendeleev invented the periodic in 1869, 5 years after John Newlands put forward his law of Octaves. Part of Dmitri’s periodic table He realised that the physical and chemical properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table. He also stated: The elements, if arranged according to their atomic mass, exhibit an apparent...
    447 Words | 2 Pages
  • History of the Periodic Table - 383 Words
    History of the Periodic Table The periodic table was founded during the 1800’s due to the contributions of three main scientists; John Newlands, Dmitri Mendeleev, and Henry Moseley. - In 1865, John Newlands proposed the ‘Law of Octaves’, which stated that every eighth element shared similar properties (eg. Lithium, Sodium, and Potassium). This allowed him to group elements in a similar structure to the current periodic table and thus predict the properties of some elements, however, this was...
    383 Words | 1 Page
  • Periodic Table and Sodium - 725 Words
    Sodium, one of many elements in the periodic table is being used in everyday life, it is also an essential element within your body. It is just another element, but one of the differences is that this element is something that most people consume every day. Sodium has played an important role in everyday life because of its uses in medicine, industry, and agriculture(Shriver). Sodium was discovered in 1807 by a man named Sir Humphrey Davy. He was well known for his discoveries of most alkali...
    725 Words | 2 Pages
  • Periodic Table and Technetium - 733 Words
    The name of the chemical element is Technetium. Tc is the symbol of Technetium in chemistry. (Also it is the symbol of the republic of Turkey which is the country that the most awesome man, Karl Machin, lives in.) Technetium has 43 protons so its atomic number is 43. It has 55 neutrons. The sum of 55 and 43 is 98 because of that 98 is the mass number of Technetium. It is in the d-block and it is a transition metal. Technetium is in the 7th group in the periodic table because it has 1 electron on...
    733 Words | 3 Pages
  • periodic table research paper
     Chemists have gone through many different ways of ordering the elements to show the relationships between their properties to get to the periodic table we have today. The modern periodic table displays the elements by increasing atomic number (the number of protons in the nucleus of an atom). In the past though, relative atomic masses were used to try to organize the elements, mostly because the notion of atoms being made up of smaller sub-atomic particles had not been developed yet....
    1,275 Words | 4 Pages
  • The Development of the Periodic Table - 345 Words
    The Development of the Periodic Table Although Dmitri Mendeleev is often considered the ‘father’ of the periodic table, the work of many scientists contributed to its present form. Between 1817-1829, Johann Dobereiner began to group elements with similar properties in to groups of three or triads. This began when he noticed that the atomic weights of strontium (Sr) were halfway between Calcium (Ca) and Barium (Ba). He stated that nature contained triads of elements in which the middle...
    345 Words | 2 Pages
  • History of the Periodic Table - 2160 Words
    Lesson 3.01: History of the Periodic Table 1. Explain how scientific observations led to the development of, and changes to, the periodic table. Dmitri Mendeleev- first periodic table, organized 63 known elements according to properties, organized into rows and columns. He wrote names, mass and chemical properties on each. Julius lothar Meyer- independently worked in German , similar to Mendeleev Henry Gwyn Jeffrey’s Moseley: worked with Ernest Rutherford experimented with 38 metals, he found...
    2,160 Words | 7 Pages
  • Science Periodic Table Essay
    The Periodic Table The periodic table has been updated all throughout history. Elements have been around us since the beginning of time. Elements, such as gold and silver, are examples of these elements that have been known for centuries. The periodic table allows us to see the elements in their families so we can understand what properties they have. It also allows us to see the atomic number, atomic mass, and the symbol of the element. The periodic table is a source of knowledge that is...
    700 Words | 2 Pages
  • Scientist and Contributions to the Periodic Table
    Antoine-Laurent de Lavoisier | Published a textbook that contained a list of elements, or substances that could not be broken down further, which included oxygen,nitrogen, hydrogen, phosphorus, mercury, zinc, and sulfur. It also forms the basis for the modern list of elements. | Johann Wolfgang Döbereiner | Found that some elements formed groups of three with related properties. He termed these groups "triads". In all of the triads, the atomic mass of the second element was almost exactly the...
    306 Words | 1 Page
  • Periodic Table essay - 1323 Words
    Periodic Table The periodic table is a table, where all known chemical elements are arranged. They are organized on the basis of their atomic numbers, electrons and chemical properties. The atomic of an element is the same as the number of electrons or protons in that particular atom. They elements in the table are placed in order from the lowest to the highest. 429768018669000The periodic table is ordered into periods and groups. A row of elements across the periodic table is calleda a...
    1,323 Words | 4 Pages
  • Periodic Table Notes - 669 Words
    The Periodic Table Notes History of the Periodic Table * Two main contributors * Dmitri Mendeleev * Henry Moseley Dmitri Mendeleev – Russian * 1869: published his periodic table with the 63 known elements * Arranged the first periodic table in order of increasing atomic masses Henry Moseley – British * 1913 revised Mendeleev’s periodic table * Today’s periodic table * Arranged in order of increasing atomic numbers What is the difference between...
    669 Words | 4 Pages
  • Lab writeup Periodic table
    Corey 10/27/13 Periodic Table Lab Chemistry Purpose: Finding the general properties of elements through tests and then being able to organize the metals, nonmetals, and semimetals on the periodic table. The purpose of this lab...
    631 Words | 2 Pages
  • Notes for Periodic Table. - 360 Words
    Development of the periodic table ➢ The elements in the periodic table have been arranged in the order of the number of protons (a.k.a. atomic number) The next significant stage in the development of the periodic table was discovered by came from John Newlands. He arranged the known elements in order of their atomic masses. He introduced the ‘law of octaves’ which meant that every eighth element had similar properties. As it didn’t work for all the known elements it was therefore...
    360 Words | 2 Pages
  • Periodic Table and Titanium - 535 Words
     Titanium Titanium is one of the 118 elements on the periodic table. It can be found on the periodic table with the atomic number 22,with the symbol Ti, in period 4,group 4,and under the element category transition metals. Its appearance is gray and has 20 neutrons. It is non-magnetic, and has the highest strength to weight ratio of any metal. On the mohs hardness scale it is 6. Titanium has several uses. It is used for alloys with other metals. The alloys are used for the aerospace...
    535 Words | 2 Pages
  • Chemistry the Periodic Table and Bonding
    Subject: Chemistry Topic: The Periodic Table The periodic table is a classification of all the elements based on ATOMIC NUMBER. It is composed of HORIZONTAL PERIODS and VERTICAL GROUPS which contain the elements arranged: *the order of INCREASING ATOMIC NUMBER *in the relation to the ELECTRON STRUCTURE of the atoms *in the relation to their CHEMICAL PROPERTIES (Criteria Used For Placing ELEMENTS in the Periodic Table) 1. ATOMIC NUMBER 2. NUMBER OF SHELLS (PERIOD) 3. NUMBER OF...
    1,472 Words | 6 Pages
  • Periodic Table Trends Essay
    Periodic Table Trends Quiz 1. The most reactive metals are located in the lower left hand corner of the periodic table 2. Which of the following atoms listed below has the largest atomic radius? Ca 3. Compared to the atomic radius of a rubidium atom, the atomic radius of a strontium atom is smaller. The smaller radius is primarily the result of the strontium atom having greater effective nuclear charge 4. An element is most likely to have properties similar to those of...
    882 Words | 6 Pages
  • The History of the Periodic Table - 1190 Words
    Since the ancient times, people like the Greeks were acknowledged of the existence of elements, but only knew of common ones like gold, tin, and copper. It wasn't until the middle of the nineteenth century when about 50 elements were discovered and scientists began to wonder if the elements vary from each other or if a pattern is represented in the arrangement of the elements. A number of scientists tried different kinds of patterns. For example, the German scientist Johann Wolfgang Döbereiner...
    1,190 Words | 4 Pages
  • periodic table annotation - 2077 Words
    The Periodic Table By Eric Scerri 1. I just returned home from being interviewed for a new public television program on the mystery of matter and the search for the elements. It was very gratifying to see how keen the film-makers were on understanding precisely how Mendeleev arrived at his famous first periodic table of 1869. This in turn meant that I had to thoroughly review the literature on this particular historical episode, which will form the basis of this blog. 2. The usual version of...
    2,077 Words | 5 Pages
  • Periodic Table and Barium Chloride Hydrate
    Water of Hydration; The Removal of Water from a Barium Chloride Hydrate Introduction: 1) Salts are compounds that are metal elements bound to non–metal elements through ionic bonding. a. Examples: NaCl, CaSO4 2) Hydrates (or hydrated salts) are compounds which contain a specific amount of water chemically bound. a. Iron (II) Sulfate Monohydrate (or Ferrous Sulfate Monohydrate): FeSO4∙H2O b. The polar water molecules are held by the attractive forces to the...
    1,138 Words | 5 Pages
  • Elements in Period 3 of Periodic Table
    Period 3 Elements – Summary of Physical Properties Advanced Chemistry Book + website The elements in Period 3 of the periodic table are the elements sodium to argon. They represent the most straightforward trend in properties. As the atomic number of the elements increases across a period, the trend is from metallic to a non-metallic character. Electronegativity is a measure of an element's ability to attract a shared electron pair to itself. Metals have a smaller electronegativity than...
    438 Words | 2 Pages
  • Periodic Table and Alkaline Earth Metals
    Laboratory# 26 Group 2: The Alkaline Earth Metals Period E Bautista, Angel Table D Comer, Tyler 3/22/12 Sullivan, Brittany Truong, Phuoc Conclusions and Questions 1. Step 1: Ca(s) +H2O->Ca (OH)2(aq)+H2(g) Step 4: Mg(s) +H2O->Mg (OH)2(aq)+H2(g) Step 10: CaSO4 + H2O-> Ca(OH)2 + H2SO4 MgSO4 + H2O ->Mg (OH)2 + H2SO4 Barium Sulfate: No reaction Step 13: MgCl2 + Na2CO3 -> MgCO3 + 2NaCl CaCl2 + Na2CO3 -> CaCO3 +...
    360 Words | 2 Pages
  • Periodic Table and Exam Review Answer
    Module 3 Exam Review ANSWER KEY Multiple Choice 1. Which of the following did Mosley believe?(3.01) a. The elements should be arranged based upon current knowledge of electrons. b. The elements should be arranged based upon the number of neutrons. c. The periodic table should be organized based upon atomic number. d. The periodic table should be organized based upon chemical properties. 2. What is significant about elements in the same group on the periodic table? (3.02) a. They have...
    276 Words | 2 Pages
  • A Brief History of the Development of Periodic Table
    A BRIEF HISTORY OF THE DEVELOPMENT OF PERIODIC TABLE Although Dmitri Mendeleev is often considered the "father" of the periodic table, the work of many scientists contributed to its present form. In the Beginning A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. Although elements such as gold, silver, tin, copper, lead and mercury have been known since antiquity, the first scientific discovery of an element occurred in 1649...
    2,750 Words | 9 Pages
  • Arsenic Is a Chemical Element on the Periodic Table
    Arsenic is a chemical element on the periodic table. It is has an atomic number 33 and has the symbol As. Arsenic is a poisonous element and it is a metalloid. Arsenic is used in pesticides, because its very harmful to humans it is diluted and made to a less toxic state. Also, a lot of wood is treated with a form of arsenic to keep it from rotting and being infested with insects. Arsenic is a very harmful and deadly element. Arsenic is used in lead hydrogen arsenate and is used in...
    553 Words | 2 Pages
  • History of the periodic table--Alexandre Beguyer de Chancourtois
    Alexandre Beguyer de Chancourtois (1820-1886) oIn 1863, a 44 year old French geologist, he created a list of the elements arranged by increasing atomic weight. The list was wrapped around a cylinder so that several sets of similar elements lined up, creating the first geometric representation of the periodic law. oIn 1862 was the first person to make use of atomic weights to reveal periodicity (i.e. when the elements were arranged according to their atomic weights, similar elements seemed to...
    348 Words | 2 Pages
  • The Alkaline Earths and the Halogens: Two Families in the Periodic Table
    Experiment 2: The Alkaline Earths and the Halogens: Two Families in the Periodic Table Lab Report By: YOU Introduction: The purpose of this lab was to find the relative solubilities of some salts of the Alkaline Earths and use that information to find the order which they appear in the periodic table; also use that information to efficiently find an unknown alkaline earth halide. Also to find the relative oxidizing powers of the Halogens given and using that information finding the order of...
    700 Words | 3 Pages
  • The Contribution Of John Newlands To The Historical Development Of The Periodic Table
    The contribution of John Newlands to the historical development of the periodic table John Newlands was a nineteenth century London born chemist. He was one of the very first scientists to establish a system of classification of the elements, only sixty of which had been discovered when he was alive. He was home schooled but went on to train at the Royal College of Chemistry. It was he who first organised the elements in order of their relative atomic mass, although similar work had already...
    357 Words | 1 Page
  • Humanism Elements in Teaching Periodic Table of Elements
    Mini Proposal Faculty of Education University of Malaya Topic of Research: Development and Evaluation of Humanism Elements in teaching and learning ‘Periodic Table of Elements’ among Form 4 students Prepared by: LIM PEI LEE (PGJ 110010) Post Graduate for Master in Education (Science Education) Semester 2, Session 2011/2012, Education Faculty, University of Malaya. Table of Contents |No. |Contents...
    6,070 Words | 26 Pages
  • Variation in Properties in the Third Row of the Periodic Table
    Experiment 5: VARIATIONS IN PROPERTIES IN THE THIRD ROW OF THE PERIODIC TABLE INTRODUCTION The periodic table is a tabular display of the chemical elements, organized on the basis of their atomic numbers and chemical properties. Elements are presented in increasing atomic number. Elements with the same number of valence electrons are kept together in groups, such as the halogens and the noble gases. Due to this, there are gaps that form four distinct rectangular areas or blocks. The...
    673 Words | 3 Pages
  • Grade 11 Chemistry - the Periodic Table Notes
    Chapter 11 - The Periodic Table 11-1 Organizing by Properties Dmitri Mendeleev (1834-1907) russian, published his element classification in 1869 - increasing molar mass - matching similar properties Mendeleev's periodic table included gaps - yet to be discovered - predicted the properties of missing elements repetition in properties of the elements was a fundamental pattern in nature - periodicity of the elements modern periodic law: the properties of the elements recur periodically...
    796 Words | 4 Pages
  • CAI For Basic tutorial of Periodic Table of Elements
    1.0 INTRODUCTION 1.1 Background of the Study In our generation today, technology is changing fast. Inventions are advancing and improving, but there are still some things that are done in a manual way. Chemistry learners, especially students and instructors still use periodic table of elements that can be bought in bookstores. The proponents intend to design, develop and implement a CAI for basic tutorial in periodic table of elements. Instructors tend to manually compute for valence and...
    1,438 Words | 5 Pages
  • The Nomenclature of Inorganic Compounds: The Periodic Table of Elements
    Discussion no. 2 The Nomenclature of Inorganic Compounds Discussion no. 3 The Periodic Table of Elements Sta. Maria, Yza Suaco, Trisha Marie T. Teves, Joan Marie Vale, Kate IN-9 Group 9 I. Introduction Representing molecules as images allows us to impart a great deal of information concerning molecular structure. But these molecules can also be named, and there are occasions when this is more convenient than drawing a picture. In the early days of chemistry, the list of known...
    6,331 Words | 23 Pages
  • Ch6 Periodic Table HW Pkt KEY 12 13
    NAME: ANSWER KEY PERIOD: __________ CHAPTER 6 PERIODIC TABLE HOMEWORK/PRACTICE PACKET HW#1 PERIODIC TABLE VOCABULARY Match the correct vocabulary term to each numbered statement. Write the letter of the correct term on the line. Column A a 1. The highest occupied s and p sublevels are partially filled. n 2. The highest occupied s sublevel and a nearby d sublevel contain electrons. m 3. metals having only 2 electrons in the highest occupied...
    2,641 Words | 14 Pages
  • Periodic Properties - 1734 Words
    LAREDO COMMUNITY COLLEGE Science Department CHEM 1411-1412 Practice Test Ch. 7 Periodic Properties Newton Name Instructions: Circle the letter of the BEST answer(s). Some questions may have multiple answers; be sure to include all correct answers. Each correct question is worth two (2) points. 1) __________ is credited with developing the concept of atomic numbers. A) Lothar Meyer B) Ernest Rutherford C) Michael Faraday...
    1,734 Words | 29 Pages
  • Periodic Trends - 871 Words
    1. The elements with the smallest atomic radii are found in the: a) upper left-hand corner of the periodic table b) lower right-hand corner of the periodic table c) lower left-hand corner of the periodic table d) upper right-hand corner of the periodic table 2. Given the representation of a chlorine atom, which circle might represent an atom of bromine? a) Circle B b) Circle D d) Circle C 3. Given the representation of a chlorine atom, which circle might represent an atom of...
    871 Words | 4 Pages
  • Periodic Trends - 635 Words
    Periodic Table Trends When you think of a periodic table, you think of elements like oxygen, neon, lead, and iron. You may even think of numbers, rows, and columns. You may not think about trends that are happening throughout a periodic table. There are many different trends that go on in a periodic table. The trends that I am going to be describing throughout this paper are atomic mass, atomic radius, first ionization energy, and electronegativity. When you study a normal/ordinary periodic...
    635 Words | 2 Pages
  • Peridoic Table - 692 Words
    Facts of the periodic table While Dmitri Mendeleev is most often cited as the inventor of the modern periodic table, his table was just the first to gain scientific credibility, and not the first table that organized the elements according to periodic properties. There are 90 elements on the periodic table that occur in nature. All of the other elements are strictly man-made. Technetium was the first element to be made artificially. The International Union of Pure Applied Chemistry, IUPAC,...
    692 Words | 3 Pages
  • Periodic Classification of Elements - 884 Words
    PERIODIC CLASSIFICATION OF ELEMENTS Introduction There are 115 elements that are known at present. Some elements have similar properties whereas some others have completely contrasting properties Scientists began to look for some pattern in the properties of these elements Dobereiner’s triads In 1817, Johann Wolfgang Dobereiner, a German chemist, classified elements into groups based on their properties. He kept all elements having similar properties in one group. Most of his groups had...
    884 Words | 3 Pages
  • 3.03 Periodic Trends - 275 Words
    1. Refer to the graph that you created in Part I of this assignment. Describe the general trend or patterns that you observed in the atomic radius as you go across the periodic table. (2 points) The atomic radius decreases as the atomic number increases. 2. In Part II of this assignment, you graphed the atomic radius of some elements from group 14 on the periodic table. What is the general trend for atomic radius going down that group? (2 points) The atomic radius increases with every period...
    275 Words | 1 Page
  • The Periodic Guide: Study Guide
    Lesson 03.01: History of the Periodic Table Explain how scientific observations led to the development of, and changes to, the periodic table. -Dmitri Mendeleev- first periodic table, organized 63 known elements according to properties, organized into rows and columns and wrote name, mass, and chemical properties on each -Julius Lothar Meyer- independently worked in Germany, similar to Mendeleev -Henry Gwyn Jeffreys Moseley- Worked with Ernest Rutherford, experimented with 38 metals, he...
    1,215 Words | 6 Pages
  • 03.03 Periodic Trends - 608 Words
    Andrew Hom Chemistry CP O3.03 Periodic Trends Part I: Atomic Radius Trend Going Across the Periodic Table Part 2: Atomic Radius Trend Going Down A Group Part 3: Analysis and Conclusion After completing both graphs, answer the questions below in complete sentences. Both the question and your answer should be included in the document (along with the two graphs) that you submit to your instructor. 1) Refer to the graph that you created in Part 1 of this assignment. Describe the...
    608 Words | 2 Pages
  • 3.03 periodic trends - 378 Words
    PART I ATOMIC RADUIS TREND GOING ACROSS THE PERIODIC TABLE PART II ATOMIC RADUIS TREND GOING DOWN A GROUP 1. Refer to the graph that you created in Part I of this assignment. Describe the general trend or patterns that you observed in the atomic radius as you go across the periodic table. (2 points) It looks like the atomic radius is bigger if the atomic number is small. This may be because of the decrease of the pull that the protons give the electrons the smaller the atomic number.2....
    378 Words | 2 Pages
  • Periodic Classification of Elements - 298 Words
    Periodic Classification of Elements Classification of Elements according to electron configuration ( type of subshell being filled) *valence electrons –outer electrons of atom which are those involved in chemical bonding ; accounts for similarities in chemical behavior among elemens within each of this groups * Representative elements/ Main Group elements * Group 1A-7A * Incompletely filled s/ p subshells * Display a wide range of physical and chemical properties...
    298 Words | 2 Pages
  • Graphing Periodic Trends - 728 Words
    Introduction: The periodic is a table of the elements, organized in order of increasing atomic number. Elements that have similar chemical properties and electronic structures appear in vertical columns, or also called groups. The Periodic Law states that when elements are placed in order of increasing atomic number, their physical and chemical properties display a periodic pattern. The purpose of the lab was to discover how two periodic properties, atomic radius, and first ionization energy,...
    728 Words | 3 Pages
  • Periodic Properties of Atoms - 1127 Words
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