Question

Match the electron shells with the corresponding number of electrons present.

• A. $18$
• B. $32$
• C. $2$
• D. $8$

Answer 1

The number of electrons present in a shell is given by $2{\text{n}}^2$, where $\text{n}$ is the number of the shell.

• For K-shell, $\text{n}=1$ and the number of electrons are $2(1{)}^2=2$
• For L-shell, $\text{n}=2$ and the number of electrons are $2(2{)}^2=8$
• For M-shell, $\text{n}=3$ and the number of electrons are $2(3{)}^2=18$
• For N-shell, $\text{n}=4$ and the number of electrons are $2(4{)}^2=32$