Explain giving reason, which of the following sets of quantum numbers are not possible :

# Explain giving reason, which of the following sets of quantum numbers are not possible :

**prasanna**#1

**prasanna**#2

(a) when n = 1, value of l cannot be equal to 1.

Thus it is not possible.

(b) Value of n i.e., shell starts from 1 and not from zero. Thus, not possible.