What is the lowest energy orbital?
Lowest energy orbital:
From (n+l) rule: The lower will be the value of (n+l), the lower will be the energy of orbital.
For 1s orbital:
n=1, s=0
So, (n+l) = 1+0 = 1, which is possible minium value of (n+l).
Among the following, the orbital that has the lowest energy is