first 36 elements of the periodic table. Procedure: A piece of graph paper was given out by the teacher. A periodic table that has the atomic number‚ atomic radius (AR)‚ and first ionization energy (IE) was given out by the teacher. A sheet of paper was taken out to record the elements‚ atomic number‚ atomic radius (AR)‚ and the first ionization energy (IE). To record the data‚ a chart that was split into four sections was made. After recording all the data‚ the periodic table was given back to the
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Chapter 3 Atoms and Elements 1 3.1 Elements and Symbols Chemistry: An Introduction to General‚ Organic‚ and Biological Chemistry‚ Eleventh Edition Copyright © 2012 by Pearson Education‚ Inc. Elements 2 Elements are • pure substances that cannot be separated into simpler substances by ordinary laboratory processes • the building blocks of matter • listed on the inside front cover of this text Chemistry: An Introduction to General‚ Organic‚ and Biological Chemistry‚ Eleventh Edition Copyright
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relative charge of 1+ and a relative atomic mass of 1 Neutrons – are neutral‚ therefore the charge is 0. Also has a R.A.M of 1 Electrons – has a negative charge (1- )‚ and has a R.A.M of 1/2000 Listed in the periodic table‚ are elements. All elements have a neutral charge‚ or the charge always equal 0. This is why the amount of protons and electrons are the same in every element. Also‚ the relative atomic mass does not include the electrons‚ because their mass is
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Table setting and Table skirting What is Table Table setting or place setting refers setting? to the way to set a table with tableware—such as eating utensils and for serving and eating. Table setting refers to the way the table appointments and the food are arranged in the dining table. By knowing and following the rules‚ you can enjoy your meals and impress your guests. 7 Basic Principles in Table Setting 1. Table appointments include materials for setting the table such as the tablecloth
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Periodic Table Timeline http://www.history-timelines.org.uk/events-timelines/19-periodic-table... Periodic Table Timeline Timelines of Events History & Timelines Index Next Event Timeline>> Periodic Table Timeline This Chemistry Timeline has been developed to provide a ’snapshot’ of the famous people and events during this historical time period. Important dates in a fast‚ comprehensive‚ chronological‚ or date order providing an actual sequence of important past events which were
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scientist involved in formulating the modern periodic table and describe why their work made a significant contribution to the development of the periodic table. Dmitri Mendeleev’s contribution to the modern day periodic table is widely renowned in the history of chemical science. Mendeleev was the creator of the periodic table; arranging 63 known elements in order of their atomic mass. His discovery made a significant impact in the development of the periodic table as it set the foundation for further
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of electrons when calculating the atomic mass of an atom because they weigh so little (precisely 1/1836 AMU)‚ and only in precise calculations are the masses of the electrons included in atomic mass. 2. What was the difference between Mendeleev’s table and Mosley’s new arrangement? Mendeleev arranged the 63 elements know at his time in order of increasing relative atomic mass‚ whiles Mosley later order the elements in order of increasing atomic number‚ or the number of protons in the atom. Mendeleev
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TIME – 2 ½ HOUR MAXIMUM MARKS = 60 (Each question carrys 1 mark) 1. Name the functional group present in CH3COCH3. 2. State modern periodic law. 3. Why are detergents harmful? 4. Define menopause. 5. Write the full form of IUCD. 6. What is genetic drift. 7. Name the type of fission carried out by Amoeba. 8. What does a negative sign in the value of magnification of a mirror indicate
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reactivity of some elements or gases is greater than that of others. When Dmitri Mendeleev created the periodic table he arranged the elements based on their relative atomic mass. Alkali metals are very reactive when mixed with other elements and are placed in Group 1A of the periodic table. There are also extremely reactive nonmetal elements called halogens and are known to be in group 7A in the periodic table. Both the alkali metals and the halogens (nonmetals) on considered to be main group elements. When
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Homework Packet Periodic Table (70 pts) Historical Background of the Periodic Table (pp. 113-116) 1. What did John Newlands contribute to the Periodic Table? 2. List three ideas Mendeleev used to design the modern Periodic Table. (3) a. b. c. 3. How did Moseley modify the Periodic Table? Characteristics of the Periodic Table (pp. 117-122) 4. Do the periods of the table go horizontal or vertical across the table? 5. Do the groups of the table go horizontal or vertical across the table? Class
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