Question

The maximum number of electrons that are present in $\text{K}$ shell of an atom is ______.

• A. two
• B. eight
• C. sixteen
• D. thirty two

Answer 1

The correct option is A two

The maximum number of electrons that can be accommodated in ${\text{n}}^{\text{th}}$ shell is given by the formula: $2\times {\text{n}}^2$.

For K-shell the value of $\text{n}$ is 1. Putting this value of n in the formula we have: $2\times {\text{1}}^2$ = 2.