Question

Which one among the following has an octet of valence electrons?

• A. Cation
• B. Inert Gas
• C. Crystal
• D. Anion
• E. Element

Answer 1

Answer: (B)

Inert Gas

Inert gas has an octet of valence electrons.
An octet of valence electrons corresponds to eight valence electrons.
For example, the electronic configuration of neon is $1^{2}2s^{2}2p^6$. It has eight valence electrons.
Note: Since inert gases have completed their octet, they are stable and chemically inert.