$^{14}N_7: 1s^2 2s^{2}2p^3$
`→ N^{3-}: 1s^2 2s^{2}2p^6`
$^{23}Na_{11}: 1s^2 2s^22p^63s^1$
`→ Na^{+}: 1s^2 2s^{2}2p^6`
$^{19}F_9: 1s^2 2s^{2}2p^{6}3s^1$
`F^{-}: 1s^2 2s^{2}2p^{6} 3s^2`
$^{32}S_{16}: 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^4$
`→ S^{2-}: 1s^{2} 2s^{2} 2p^{6} 3s^{2}3p^6`
$^{40}Ca_{20}: 1s^{2} 2s^{2}2p^{6}3s^{2}3p^{6}4s^2$
`→ Ca^{2+}: 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^6`
$^{27}Al_{13}: 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^1$
`→ Al^{3+} : 1s^{2} 2s^{2} 2p^6`