Question

The correct order of increasing energy of atomic orbitals is

• A. 5p < 4f < 6s < 5d
• B. 5p < 6s < 4f < 5d
• C. 4f < 5p < 5d < 6s
• D. 5p < 5d < 4f < 6s

Answer 1

The correct option is B

5p < 6s < 4f < 5d

According to Aufbau principle electron are filled in various atomic orbital in the increasing order of energy

1s< 2s< 2p< 3s< 3p< 4s< 3d< 4p< 5s< 4d< 5p< 6s< 4f< 5d<6p< 7s.