2 11. Strontium's highest occupied energy level is 5s2. To what group does strontium belong? a. Group 2 b. Group 5 c. Group 6 d. Group 8
3 2. In nature, the alkali metals occur as a.elements.b.compounds.c.complex ions.d.gases.
4 2 1. The most reactive group of the nonmetals is the a. lanthanides. b. transition elements.c. halogens.d. noble gases.
5 2. Compared to the alkali metals, the alkaline-earth metals a. are less reactive.b. have lower melting points.c. are less dense.d. combine more readily with nonmetals.
6 31. A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is calleda. electron affinity.b. electron configuration.c. electronegativity.d. ionization potential.
7 2. A negative ion is known as a(n) a. ionic radius.b. valence electron.c. cation.d. anion.
8 41. For each successive electron removed from an atom, the ionization energya. increases.b. decreases.c. remains the same.d. shows no pattern.
9 2. In Group 2 elements, the valence electrons are in sublevel a. d.b. p.c. s.d. f.
10 5 1. The number of valence electrons in Group 17 elements is a. 7. d. equal to the period number.
11 2. Among the d-block elements, as atomic radii decrease, electronegativity values a. remain constant.b. increase.c. decrease.d. drop to zero.
12 Answers & Standards 1.1 – a sc4 1.2 –b sc4b 2.1 –c sc4b 2.2 –a sc4b 3.1 – c sc4a3.2 – d sc4a4.1 – a sc4a4.2 – c sc3b5.1 – a sc3b5.2 – b sc4a
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