Question

Between 4f and 5d which is lower in energy and why​

Answer 1

Explanation:

n+l = energy of the orbitals

4f = 4 +3 = 7 (l=3 for f orbital)

5d = 5 +2 = 7 (l = 2 for d orbital)

if n+l value is same , lower n lower energy

4f is lower energy orbital