Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95b: 36

a) $2-$ b) $1-$ c) $2+$ and $3+$ d) $3-$

According to the periodic table and fig. 2-18 a) Se (Group 6A): $2-$ b) F (Group 7A): $1-$ c) Fe (Fig. 2-18): $2+$ and $3+$ d) N (Group 5A): $3-$ Note that Iron has numerous common charges.