Question

If $K$ and $L$ shell of an atom are full, then what would be the total number of electron in the atom?

• A. $10$ electrons
• B. $2$ electrons
• C. $8$ electrons
• D. $18$ electrons

Answer 1

The correct option is A $10$ electrons

$K$ shell can hold a maximum of $2$ electrons. Whereas $L$ shell can have a maximum of $8$ electrons.

If $K$ and $L$ shell of an atom is completely filled, then the maximum no. of electrons in that atom $=2+8=10$

So, the correct option is $A$