### Q.:- If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

**Answer:-**

**Answer:-**

The maximum number of electrons present in a shell = 2n^{2}

Where n = shell number

Value of n for K shell = 1

Therefore, Maximum number of electrons in K shell = 2n

^{2}= 2(1) = 2Value of n for L shell = 2

Therefore, Maximum number of electrons in L shell = 2(2)

^{2}= 8Thus, total no. of electrons = 2 + 8 = 10