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JEE Advanced levelSingle correct optionDifficulty 3 of 3as159

Which pair of orbitals has the SAME number of radial nodes and an orbital-angular-momentum ratio $L_{1} / L_{2} = 3$ (first orbital named first)?

A4d and 3p
B3d and 3p
C5d and 4f
D4p and 3s

Answer: A

4d: radial nodes

= 1

,

L = 6 ℏ

; 3p: radial nodes

= 1

,

L = 2 ℏ

; ratio

3

. 3d/3p differ in radial nodes (0 vs 1); 4p/3s have radial nodes 2 and 2 but 3s has

L = 0

; 5d/4f have radial nodes 2 and 0.

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