Which is the correct order of increasing energy of the listed orbitals in the atom of titanium? (Atomic number Z = 22):

Options

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

Answer

A

Explanation

According to Aufbau.s rule of increasing order of energy for filling up to electron.
`Ti(22) =1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(1)`
`3s lt 3p lt 4s lt 3d`