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In a multi-electron atom, which of the f...

In 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=0, (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

a and b

B

b and c

C

c and d

D

d and e

Text Solution

Verified by Experts

The correct Answer is:
D
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).
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