Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. No. Z = 22)

Options

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

Answer

B

Explanation

Group state electronic configuration of titanium is `1s^(2) 2s^(2) 2p^(6) 3p^(6) 3d^(2) 4s^(2)`
Thus, the order of increasing energy is
`3s lt 3p lt 4s lt 3d`