JEE Main 2015ChemistryStructure of AtomMediumMCQ

JEE Main 2015 — Structure of Atom Question with Solution

JEE Main 2015 (10 Apr Online)

Question

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

Choose an option

Show full solutionCorrect option: D
Correct answer
Dns→n-2f→n-1d→np

Step-by-step explanation

As per n+l rule electrons fill first in that orbital which have least n+l value.
When n+l values are same, then electron fills that orbital which have lowest n value.
when n=6 as per n+l rule when n=6
ns subshell ⇒6+0=6

n−1 d subshell ⇒5+2=7

n−2 f subshell ⇒4+3=7

np subshell ⇒6+1=7

ns , n-2f, n-1d,np

n+l values ⇒7, 7, 7 

n value ⇒4, 5, 6
 

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About this question

This is a previous-year question from JEE Main 2015, covering the Structure of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.