Q. Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z = 22)
A) 3s 3p 3d 4s
B) 3s 3p 4s 3d
C) 3s 4s 3p 3d
D) 4s 3s 3p 3d
Explanation
[Solution] Ti: $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^2$; filling order 3s < 3p < 4s < 3d. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.