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Chapter7 - CHE141 Chapter 7 Chapter 7 Periodic Properties...

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CHE141 Chapter 7 Copyright © 2006 Dr. Harshavardhan D. Bapat 1 Chapter 7 Periodic Properties of the Elements 1. Elements in the modern version of the periodic table are arranged in order of increasing __________. (a). oxidation number (b). atomic mass (c). average atomic mass (d). atomic number Explanation: The older version of the periodic table had the elements arranged in order of increasing atomic mass, but the modern version of the periodic table is based on the increasing order of atomic number. 2. The first ionization energies of the elements __________ as you go from left to right across a period of the periodic table, and __________ as you go from the bottom to the top of a group in the table. (a). increase, increase (b). increase, decrease (c). decrease, increase (d). decrease, decrease Explanation: The ionization energies (IE s) of elements increase to the right in a row since larger amounts of energy need to be supplied to remove an electron. The elements become more non-metallic making it harder to remove an electron. 3. The __________ have the most negative electron affinities
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CHE141 Chapter 7 Copyright © 2006 Dr. Harshavardhan D. Bapat 2 4. Element M reacts with chlorine to form a compound with the formula MCl 2 . Element M is more reactive than magnesium and has a smaller radius than barium. This element is __________. 5. The oxide of which element below can react with hydrochloric acid?
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