Question

Which of the following shells can have maximum of 2 electrons?

• A. K
• B. L
• C. M
• D. N

Answer 1

The correct option is A

K

Explanation for the correct options:

(A) K

• The maximum number of electrons in any shell is equal to $2{\mathrm{n}}^2$
• For K- shell, the value of n=$1$ .
• The maximum number of electrons in K shell is $2\times 1^2=2$.

Explanation for the incorrect options:

(B) L

• The maximum number of electrons in L shell is $2\times 2^2=8$.

(C) M

• The maximum number of electrons in M shell is $2\times 3^2=18$.

(D) N

• The maximum number of electrons in N shell is $2\times 4^2=32$.

Hence, option (A) is correct., K shells can have a maximum of 2 electrons.