Question

For H-atom the correct order of energy of orbitals is

Answer 1

Answer:

Energies of orbitals of hydrogen and hydrogen-like particles depend upon the value of principal quantum (n) number only, those of multi-electron atoms depend both upon principal quantum number( n ) as well as azimuthal quantum number(l).

The energy depends on n+l value. Higher the values of n+l, higher are the energy.

For 3rd shell, n= 3

For s orbital, l=0

For p orbital, l=1

For d orbital, l=2

In the 3rd shell, energies are in the order: 3s < 3p < 3d.

Hence, the correct option is C

Answer 2

In the hydrogen atom the energy of the electron depends only on the value of the principle quantum number n as shown by the solution to the Schrodinger Wave Equation and experimentally by the emission spectrum. The order of energies is 1s<2s = 2p<3s=3p=3d<4s=4p=4d=4f<5s=5p=5d=5f ......