Question

The energies of orbitals of hydrogen atom are in the order :
1.3s <3p <4s <3d <4p
2.3s <3p <3d <<4s <4p
3.3s=3p=3d <4s=4p
4.3s=3p=3d <4s <4p

Answer 1

Explanation:

third option

coz in hydrogen energy remains same in any one shell here 3s 3d 3p and increase in further shells here 4s 4p but these will have more energy than 3 shell coz of greater n number