Which of the following is the correct ground-state electron configuration for the…

CHEMISTRY · Single correct · A Level · Chemistry · Atomic structure · Atomic structure

Problem

Which of the following is the correct ground-state electron configuration for the oxide ion,

\text{O}^{2-}

? (a)

1s^{2}\,2s^{2}\,2p^{4}\,3s^{2}

(b)

1s^{2}\,2s^{2}\,2p^{6}

(c)

1s^{2}\,2s^{2}\,2p^{4}

(d)

1s^{2}\,2s^{2}\,2p^{5}