Question

ln a multi electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?

(A) n=1, l=0,m=O (B) n=2,l=0,m=0

(c) n=2,l=1,m=1 (D) n=3,l=2,m=1

(E) n =3,l=2,m=0

(a) (D) and (E) (b) (C) and (D)

(c) (B) and (C) (d) (A) and (B)

Answer 1

Correct option (a) (D) and (E)

Explanation:

(A) 1s (B) 2s (C) 2p (D) 3d (E) 3d

ln the absence of any field, 3d in (D) and (E) will be of equal energy.