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Unformatted text preview: CHAPTER 2 Drill/ Atoms, Molecules, and Ions 1. In 20 words or less, define the following. You may give example a) Law of multiple proportion. b) Mass number and atomic mass c) Isotopes d) Empirical and molecular formula. e) Molecular and ionic compound 2. Complete the following table: Symbol Atomic number Number of protons Number of neutrons Number of electrons Net Charges 56 Mn 81 123 1 + 35 28 15 15 3- 128 Te 2- 3. There are only two isotopes of lithium, lithium-6 and lithium-7, with atomic masses of 6.0151 u and 7.0160 u, respectively. Calculate the natural abundance of the 2 isotopes. 4. Give the name, chemical symbol and atomic number for the following a) the heaviest alkaline earth metal: b) the lightest metalloid:. c) the 4 - Period halogen d) the transition metal in period 6 and group 7: 5. List the 7 diatomic elements (formula, name, and state) in the periodic table H 2 Hydrogen Gas 6. Select answers to the questions listed below from the following list of elements whose symbols start with the letter C:...
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