Question

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 field:
(i) $n=1,l=0,m=0$
(ii) $n=2,l=0,m=0$
(iii) $n=2,l=1,m=1$
(iv) $n=3,l=2,m=1$
(v) $n=3,l=2,m=0$

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (iii) and (iv)
• D. (iv) and (v)

Answer 1

Answer: (D)

Orbitals having $(n+l)$ same possess same energy in absence of magnetic field.