Question

4. Which of the following orbitals have the lowest
energy ?
a) 4p
b) 3d
c) 4s
d) 3p​

Answer 1

$\huge\mathcal\red{Answer}$

4s orbitals have the lowest energy

Answer 2

Answer:

3p because when you start filling electrons you start from 1S² 2S² 2p6 3S² 3p6 4S² 3d¹ⁿ hence 3p fill first