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Solution


Q.

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

(A) n=1, l=0, ml=0
(B) n=2, l=0, ml=0
(C) n=2, l=1, ml=1
(D) n=3, l=2, ml=1
(E) n=3, l=2, ml=0

Choose the correct answer from the options given below:                 [2025]
1 (A) and (B) Only  
2 (D) and (E) Only  
3 (B) and (C) Only  
4 (C) and (D) Only  

Ans.

(2)

Orbitals with same value of l and m have same energy.