# Except for helium, how many electrons do noble gases have in their outer energy levels?

Jan 12, 2017

$8$ at GCSE and $8$ at A level

Jan 15, 2017

$8$ electrons.
The $\text{octet rule}$ determines the number of valence electrons in the noble gases, excluding He. Noble gases have the general electronic configuration $n {s}^{2} n {p}^{6}$.