Elements that have atoms with full outer shells of electrons

Noble gases

Explanation:

Noble gases have their outermost shell full, thar why Noble gases are the most stable elements and they do not react.

Example

Element Electronic configuration

He Is² He has two electrons in its outer shell

Ne 1s²2s²p⁶

Ar [Ne] 3s²p⁶ The other noble gases have 8

Kr [Ar]3d¹⁰4s²p⁶ electrons in their outer shell.

Xe [Kr]4d¹⁰5s²p⁶ They are stable.