Question

underline the valence electrons.

1s² 2s² 2p¹

1s² 2s² 2p¹

1s² 2s² 2p¹

1s² 2s² 2p¹

Explanation:

Valence electrons are in the outermost shell. In the electron - configuration \(1s^{2}2s^{2}2p^{1}\), the outermost shell is the second shell (\(n = 2\)). The electrons in the second shell are \(2s^{2}2p^{1}\).

Answer:

\(1s^{2}\underline{2s^{2}2p^{1}}\)