Multiple choice

1. _______ with the largest atoms and the smallest number of valence electrons and _______ with the smallest atoms and the greatest number of valence electrons are the most reactive. 

A. Nonmetals; metals

B. Transition elements; metals

C. Metals; nonmetals

D. Nonmetals; transition elements

2. Which of the following is true regarding the inner transition elements? 

A. They occupy the d block of the periodic table.

B. These include all elements in groups 3–12.

C. These include the lanthanides and actinides and do not have f sublevels.

D. Their valence electrons can be located in both s and f sublevels.

3. When an atom of iron loses all of its 4s electrons and one of its 3d electrons, what is its charge? 

A. 5+

B. 3+

C. 7+

D. 52

4. When chromium loses two electrons, its configuration changes to 

A. [Ar]4s13d5.

B. [Ar]4s13d4.

C. [Ar]3d4.

D. [Ar]4s1.