Chemistry Daily 10’s Week 8

1 1. 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

2. In nature, the alkali metals occur as a.elements. b.compounds. c.complex ions. d.gases.

2 1. The most reactive group of the nonmetals is the a. lanthanides. b. transition elements. c. halogens. d. noble gases.

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.

3 1. A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called a. electron affinity. b. electron configuration. c. electronegativity. d. ionization potential.

2. A negative ion is known as a(n) a. ionic radius. b. valence electron. c. cation. d. anion.

4 1. For each successive electron removed from an atom, the ionization energy a. increases. b. decreases. c. remains the same. d. shows no pattern.

2. In Group 2 elements, the valence electrons are in sublevel a. d. b. p. c. s. d. f.

5 1. The number of valence electrons in Group 17 elements is a. 7. d. equal to the period number.

2. Among the d-block elements, as atomic radii decrease, electronegativity values a. remain constant. b. increase. c. decrease. d. drop to zero.

Answers & Standards 1.1 – a sc4 1.2 –b sc4b 2.1 –c sc4b 2.2 –a sc4b 3.1 – c sc4a 3.2 – d sc4a 4.1 – a sc4a 4.2 – c sc3b 5.1 – a sc3b 5.2 – b sc4a