# 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.

#### Explanation:

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

Noble gases are typically nonreactive. They do, however, have some cool applications e.g. neon lights