2.
下列电子式书写正确的是( )
\(\rm{①}\)氧原子\(\rm{·\underset{··}{\overset{··}{O}}·}\) \(\rm{②}\)过氧根离子\(\rm{[\rlap{_{·}}{^{·}}\underset{··}{\overset{··}{O}}\rlap{_{·}}{^{·}}\underset{··}{\overset{··}{O}}\rlap{_{·}}{^{·}}]^{-}}\) \(\rm{③}\)氢氧根离子\(\rm{[\rlap{_{·}}{^{·}}\underset{··}{\overset{··}{O}}\rlap{_{·}}{^{·}}H]^{-}}\) \(\rm{④}\)钠离子\(\rm{[Na]^{+}}\) \(\rm{⑤}\)氢离子\(\rm{H^{+}}\) \(\rm{⑥}\)铵根离子\(\rm{[H\rlap{_{·}}{^{·}}N{H}\limits_{··},\overset{··}{H}\rlap{_{·}}{^{·}}H]^{+}}\) \(\rm{⑦}\)铝原子\(\rm{·A\overset{·}{l}·}\) \(\rm{⑧}\)溴离子\(\rm{[\rlap{_{·}}{^{·}}\underset{··}{\overset{··}{Br}}\rlap{_{·}}{^{·}}]^{-}}\)