Question

part d
underline the valence electrons.
$1s^{2}2s^{2}2p^{3}$
$1s^{2}2s^{2}2p^{3}$
$1s^{2}2s^{2}2p^{3}$
$1s^{2}2s^{2}2p^{3}$

Explanation:

Valence electrons are the electrons in the outermost shell of an atom. In the electron configuration \(1s^{2}2s^{2}2p^{3}\), the outermost shell is the second shell (\(n = 2\)). The electrons in the second shell are \(2s^{2}\) and \(2p^{3}\).

Answer:

\(1s^{2}\underline{2s^{2}2p^{3}}\) (the second option in the given choices).