According to aufbau principle, the correct order of energy of 3d,4s and 4p-orbitals is

Options

A. 4p lt 3d lt 4s
B. 4s lt 4p lt 3d
C. 4s lt 3d lt 4p
D. 3d lt 4s lt 4p

Answer

C

Explanation

According to Aufbau principle , the increasing order of the energies of the orbitals is
1s lt 2s lt 2p lt 3s lt 3p lt 4s lt 3d lt 4p lt 5s …