Home Chemistry Structure of Atom JEE Advanced Previous Years Question If the principal quantum number n = 6, the c…
Chemistry Structure of Atom JEE Advanced Previous Years Question Single Correct MCQ
Published on: August 13, 2026

If the principal quantum number n = 6, the correct sequence of filling of electrons will be:

A
ns → np → (n – 1)d → (n – 2)f
B
ns → (n –1) d → (n – 2)f → np
C
ns → (n – 2)f → np → (n – 1)d
D
ns → (n – 2)f → (n – 1)d → np

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Text Solution

Verified by Experts
The correct answer is:
D

If , the correct sequence for filling of electrons will be

.

It will be

The energy of 4 f and 5 d orbitals are in between the energies of 4 s and 6 p orbitals.

Note: Higher is the , higher will be the energy of the orbital.

For

Hence, correct order is:

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