Question

Maximum number of electrons present in M shell is :

• A. 8
• B. 18
• C. 32
• D. 2

Answer 1

Answer: (B)

18

Number of electrons present in $n$ shell = $2n^2$

For M shell,

$n=3$

$=2\times (3{)}^2$

$=2\times 9$

$=18$ electrons

Hence, option $B$ is correct.