Chapter 10, Problem 57E

Write the Lewis structure for each ion. Include resonance structure if necessary.

a. ${\text{PO}}_{\text{4}}{}^{3-}$

b. ${\text{CN}}^{-}$

c. ${\text{NO}}_{\text{2}}{}^{-}$

d. ${\text{SO}}_{\text{3}}{}^{2-}$