Question

The maximum number of electrons that can be accommodated in M shell is?

• A. $2$
• B. $8$
• C. $18$
• D. $32$

Answer 1

The correct option is C

$18$

Given:

$\mathrm{M}$ shell of atom. Thus, energy level, $\mathrm{n}=3$

Formula used:

Number of electrons in a shell$=2{\mathrm{n}}^2$

Here, $\mathrm{n}$ is the energy level of the shell.

Calculate the number of electrons in $\mathrm{M}$ shell:

For $\mathrm{M}$ shell, $\mathrm{n}=3$

Thus,

Number of electrons in $\mathrm{M}$ shell$=2{\mathrm{n}}^2$

Number of electrons in $\mathrm{M}$ shell$=2\times {\left(3\right)}^2$

Number of electrons in $\mathrm{M}$ shell$=2\times 9$

Number of electrons in $\mathrm{M}$ shell$=18$

Thus, the maximum number of electrons that can be accommodated in $\mathrm{M}$ shell is $18$.

Thus, Option (C) is the correct option.