Question

Among 4p, 4s, and 3d orbitals, 3d orbital has the least energy.

• A. True
• B. False

Answer 1

The correct option is B False

Energy is directly proportional to $(n+l)$ value. For $4s,4p,3d$ the $(n+l)$ value is $4+0=4,4+1=5,3+2=5$ respectively. Thus $4s$ has the least energy. Thus in accordance to Aufbau's rule, given statement is false.