Chapter 2, Problem 90RQ

2.90 Use the periodic table, but not Table 2.2, to write the symbols for ions of (a) barium, (b) oxygen, (c) fluorine, (d) strontium, and (e) rubidium.

TABLE 2.2 Ions Formed from the Representative Elements
Group Number
1A	2A	3A	4A	5A	6A	7A
${\text{H}}^{\text{+}}$
${\text{Li}}^{\text{+}}$	${\text{Be}}^{\text{2+}}$		${\text{c}}^{\text{4-}}$	${\text{N}}^{\text{3-}}$	${\text{O}}^{\text{2-}}$	${\text{F}}^{\text{-}}$
${\text{Na}}^{\text{+}}$	${\text{Mg}}^{\text{2+}}$	${\text{Al}}^{\text{3+}}$	${\text{Si}}^{\text{4-}}$	${\text{p}}^{\text{3-}}$	$s^{2-}$	${\text{Cl}}^{\text{-}}$
${\text{K}}^{\text{+}}$	${\text{ca}}^{\text{2+}}$				${\text{Se}}^{\text{2-}}$	${\text{Br}}^{\text{-}}$
${\text{Rb}}^{\text{+}}$	${\text{Sr}}^{\text{2+}}$				${\text{Te}}^{\text{2-}}$	${\text{I}}^{\text{-}}$
${\text{Cs}}^{\text{+}}$	${\text{Ba}}^{\text{2+}}$