in a multi- electron atom ,which of the following orbitals described by the three quantum numbers, which of the following will have nearly same energy?
`{:(( P) ,n=1","l=0"," m=0,(q) , n=2","l=0"," m=0),((r ) , n=2"," l=1"," m=1",",(S ) , n=3"," l=2"," m=1),((t ), n=3","l=2","m=0,","","",):}`

Options

A. a and b
B. b and c
C. c and d
D. d and e

Answer

D

Explanation

In a multielectron atom, orbitals (d) n = 3, l = 2, m = 0 will have same energy, as these two orbitals belong to the same sub-shell i.e., 3d (in the absence of electric and magnetic fields).