Which statements in relation to the hydrogen atom is correct

• Atomic Structure

Which of the following statements in relation to the hydrogen atom is correct?

1. 3s orbital is lower in energy than 3p orbital
2. 3s, 3p and 3d orbitals all have the same energy
3. 3s and 3p orbitals are of lower energy than 3d orbital
4. 3p orbital is lower in energy than 3d orbital

Answer

For hydrogen the energy order of orbital is

1s < 2s = 2p < 3s = 3p = 3d < 4s = 4p = 4d = 4f

The correct option is B.