Question

electrons cannot be maximum capacity of a shell

• A. 24
• B. 18
• C. 32

Answer 1

The correct option is A 24

The maximum capacity of a shell is given by $2n^2$.
Now, lets see maximum capacity upto n = 5.
$n=1\Rightarrow 2n^2=2(1{)}^2=2$
$n=2\Rightarrow 2n^2=2(2{)}^2=8$
$n=3\Rightarrow 2n^2=2(3{)}^2=18$
$n=4\Rightarrow 2n^2=2(4{)}^2=32$
$n=5\Rightarrow 2n^2=2(5{)}^2=50$
'n' can only take natural number value
So, $2n^2=24$ is not possible for any natural number.