PRACTICE EXAMPLE A: Write plausible Lewis structures for the following ions: $($a$)N{O}^{+}$; $($b$)N_2{H}_5^{+}$; $($c$)O^{2-}.$ PRACTICE EXAMPLE B: Write plausible Lewis structures for the following ions: $($a$)B{F}_4^{-}$; $($b$)N{H}_{3}O{H}^{+}$; $($c$)NC{O}^{-}.$