Date:_________________________________ There are 12 specific topics covered on the test. In addition to these you will be required to demonstrate math and graphing skills. The 12 topics covered are: The Atom Moles and Stoichiometry Nuclear Chemistry Solutions Bonding Kinetics and Equilibrium Matter Acids‚ Bases and Salts Energy Oxidation-Reduction (Redox) The Periodic Table Organic Chemistry What is the point of this packet? This review packet was assembled from NY State’s Core Curriculum‚ which outlines the
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atoms. 3. What is a chemical bond? Discuss the differences between an ionic bond and a covalent bond. Any of several forces‚ especially the ionic bond‚ covalent bond‚ and metallic bond‚ by which atoms or ions are bound in a molecule or crystal. Ionic bonds are chemical bonds between two ions with opposite charges‚ characteristic of salts. Covalent bonds are chemical bond formed by the sharing of one or more electrons‚ especially pairs of electrons‚ between atoms. 4. What are valence electrons
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Gold is gold when it is heated. Gold is gold when it turns liquid. And gold is a single solid element. The ionic bonds have an attraction between opposite charged ions by one atom‚ a metal makes a contribution of an electron and becomes a optimistic ion‚ and when another‚ a nonmetal received an electron and becomes pessimistic ion. Metal donate electrons and non-metals receives electrons. For example is Na is positive and CL is negative. The covalent bonds share the electrons and they are normally
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through the gel solution on the production of Liesegang rings. Main findings • The lead nitrate/potassium iodide and cobalt chloride/ammonium hydroxide reactions both formed bifurcations. The cobalt chloride/ammonium hydroxide reaction was then investigated under different conditions until discernable Liesegang rings had formed. • It was found that the rate of diffusion of ions was increased when a D.C. current was passed through the gel‚ however the placement of the positive electrode had
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time proceeded‚ reaching values of 101.81 and 61.67 mg g-1 respectively‚ after 120 h. The opposite behavior was observed concerning the volumetric rates of Cr(VI) and total chromium removal. The pseudo-second order model adequately described the kinetic process of chromium biosorption by avocado shell‚ which suggests that this process chiefly occurs as a result of chemisorption. 1. Introduction Chromium compounds are environmental pollutants occurring in soil‚ water and industrial effluents because
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AS Chemistry Revision-Chemistry for Life 1. Avagadro constant‚ 6.02 x 10²³ number of particles in 1 mole of a substance 2. Empirical formula-simplest ratio of atoms of each element in a compound 3. 4. Model of an atom Particle Mass on relative atomic scale Charge Proton 1 1+ Neutron 1 0 Electron Very small (0.00055) 1- 5. Radioactive isotopes Radiation What is it? Relative charge How does the nucleus change? Stopped by? Deflection in electric field? Alpha α Helium nuclei ⁴₂He +2 2 fewer
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Name : Rebecce C. Deocampo Date : September 2‚ 2013 Course/Yr. : BS Chemistry III Sched : MF 7-10‚ Group#2 Experiment No. 1 Synthesis and Reactivity of Tert-Butyl Chloride I. Objectives : 1. To produce tert-butyl chloride from tert-butyl alcohol 2. To understand the SN1 and SN2 mechanism involved in the reaction 3. To determine the yield of percentage of t-butyl chloride II. Introduction An alkyl halide is a derivative of alkanes. Alkanes are hydrocarbons with a
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Sodium chloride‚ also known as salt‚ common salt‚ table salt‚ or halite‚ is an ionic compound with the formula NaCl. Sodium chloride is the salt most responsible for the salinity of the ocean and of the extracellular fluid of many multicellular organisms. As the major ingredient in edible salt‚ it is commonly used as a condiment and food preservative. [edit] Properties Thermal conductivity of pure NaCl as a function of temperature has a maximum of 2.03 W/(cm K) at 8 K and decreases to 0.069 at 314
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glycol molecule. The ethyl glycol has more hydrogen bonds than ethyl alcohol. This gives the ethyl glycol molecule a higher viscosity than the ethyl alcohol molecule. Both kinetic energy and temperature can affect a molecule’s viscosity. When the temperature of a molecule is raised‚ the kinetic energy is also raised. When kinetic energy increases‚ molecules are more easily overcome by the forces that held the molecule together. This results in a decrease in viscosity. Viscosity is also affected by
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Revision checklist for IGCSE Chemistry 0620 A guide for Students Revision checklist for IGCSE Chemistry 0620 A guide for students How to use this guide The guide describes what you need to know about your IGSCE Chemistry examination. It will help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using tick boxes in Section 3‚ ‘What you need to know’‚ to check
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