Solution:
3P<4S<3d<4P
The electrons identified by quantum numbers n and l, i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1 can be placed in the order of increasing energy from the lowest to highest, as
The electrons identified by quantum numbers n and l, i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1 can be placed in the order of increasing energy from the lowest to highest, as
