1.

In a multi-electron atom, which of the following orbitals described by the three quantum members 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. [D] and [E]
B. [C] and [D]
C. [B] and [C]
D. [A] and [B]
Answer» B. [C] and [D]


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