THE CHEMISTRY OF LIFE (Review 1-7) I. Basic Chemistry A. Elements 1. Definition- an element is a substance composed of a single type of atom 2. Major elements of the human body 3. Trace elements of the body B. Atoms 1. Definition- the atom is the smallest part of an element which cannot be broken down further by ordinary chemical means. Atoms are composed of protons‚ neutrons and electrons. 2. Particles that make up atoms
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molecules is that atoms are the smallest units of matter and can not be divided by chemical means. Molecules are made up of atoms of the same kind that are together in a group. The difference between covalent bonds and ionic bonds are that covalent bonds have 2 atoms sharing the same electron. Ionic bonds occur when an atom takes one electron away from another atom. 2. Adhesion and Cohesion differ because adhesion is when 2 substance of the same kind are joined together. Cohesion is when 2 substances
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3.1.1 Identify that matter is made of particles that are continuously moving and interacting The particle theory states that all matter is made up of tiny particles and they are constantly moving/continual state of motion. 1.1.2 Identify the difference between elements‚ compounds and mixtures in terms of particle theory Elements are simplest form substance meaning cannot be decomposed further physically or chemically. They are made up of same type of atoms only e.g. helium‚ oxygen. Compounds
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MAPÚA INSTITUTE OF TECHNOLOGY School of Chemical Engineering and Chemistry COURSE syllabus 1. Course Code: CHM11- 3 2. Course Title: GENERAL CHEMISTRY 1 LECTURE (for Non- CHE –CHM students) 3. Pre-requisite: None 4. Co-requisite: None 5. Credit: 2 units 6. Course Description: A course designed for freshmen engineering students‚ it covers the structure of the atom‚ writing chemical formulas‚ naming of compounds and stoichiometry involving chemical formulas
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water to form alkaline solutions Neutral Oxides * Do not display either of the acidic or the basic oxides’ properties. Giant Covalent Structures There are 2 examples of Giant covalent structures: Diamond & Graphite They are both allotropes of carbon‚ meaning they are both different types of the physical form of Carbon. Diamond Structure: Giant covalent lattice of carbon atoms. Each Carbon atom is bonded to 4 others which tetrahedrally surround the atom. They have a high melting point as
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Lesson 1.1 - Study Materials Slide 1 Lesson 1.1 : Scientific Method 1. Steps of the Scientific Method The scientific method (performing a study in organized steps) consists of: For example‚ applying the scientific method ultimately led to the enunciation of the Law of Conservation of Mass and Matter. Slide 2 1. Steps of the Scientific Method Step 1: Performing Experiments An experiment is a set of steps (procedures) that are performed under controlled conditions to propose or test
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GRADE 9 Learning Module SCIENCE (Qtr 1 to 4) Compilation by Ben: r_borres@yahoo.com 1 UNIT 1 Living Things and Their Environment DRAFT April 29‚ 2014 Photo Credit: http://www.flyingfourchette.com/2013/05/25/around-ubud/ Suggested time allotment: 8 to 10 hours 2 Unit 1 MODULE 1 Respiratory and Circulatory Systems Working with Other Organ Systems Overview Your body is a fascinating creation that can carry out incredible tasks and activities. It is like a machine that
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non-polar covalent bonds. Example: H2 ‚ Cl2 ‚ I 2 Polar molecular solids → The molecules ion these types of solids are held together by strong dipole-dipole interactions. Example: Solid SO 2 ‚ solid NH3 Hydrogen-bonded molecular solids → The molecules of such solids contain polar covalent bonds between H and f‚ O or N atoms. Example: Ice (H2 O) Ionic solids Ions are the constituent particles; e.g.‚ NaCl‚ KNO 3 Metallic solids Each metal atom is surrounded by electrons; e.g.‚ Fe‚ Cu Covalent or network
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English Proficiency This test is designed to assess the test takers’ general proficiency in the use of English language as a means of self-expression in real life situations and specifically to test the test takers’ knowledge of basic grammar‚ their vocabulary‚ their ability to read fast and comprehend‚ and also their ability to apply the elements of effective writing. 1. Grammar 1. Agreement‚ Time and Tense‚ Parallel construction‚ Relative pronouns 2. Determiners‚ Prepositions‚ Modals
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elements are not regarded as transition w elements? w 10 UNDERSTANDING fus H vap H AND a H In transition metals unpaired (n - l)d electrons as well as ns electrons take part in interatomic bonding. Larger the number of unpaired (n - 1) d electrons‚ the stronger is the interatomic bonding and large amount of energy is required to overcome the interatomic interaction. ∆ fus Hθ M(s) → M(1) θ ∆ vap H M(1) → M(vapour) ∆a Hθ M(s) → M(g) These enthalpies are related as fus
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