The electrons identified by quantum numbers n and l :-
(a) n=4, l=1 (b) n=4, l=0 (c ) n=3, l=2 (d) n=3, l=1
Can be placed in order of increasing energy as

Options

A. `ii lt I lt iv lt ii`
B. `ii lt iv lt I lt iii`
C. `i lt iii lt ii lt iv`
D. `iv lt ii lt iii lt i`

Answer

D

Explanation

The order of increase of energy can be calculated from `(n+l)` rule. If two orbitals have same value of `(n+l)` the orbital with lower value of n will be filled first.