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Question: Answered & Verified by Expert
If $n=6$, the correct sequence for filling of electrons will be
ChemistryStructure of AtomJIPMERJIPMER 2014
Options:
  • A $n s \longrightarrow(n-1) d \longrightarrow(n-2) f \longrightarrow n p$
  • B $n s \longrightarrow(n-2) f \longrightarrow n p \longrightarrow(n-1) d$
  • C $n s \longrightarrow n p \longrightarrow(n-1) d \longrightarrow(n-2) f$
  • D $n s \longrightarrow(n-2) f \longrightarrow(n-1) d \longrightarrow n p$
Solution:
2911 Upvotes Verified Answer
The correct answer is: $n s \longrightarrow(n-2) f \longrightarrow(n-1) d \longrightarrow n p$
For $n-6$ olectron aro filled as $6 s \rightarrow 4 f \rightarrow 5 d \rightarrow 6 p$
This is because electron first enters in that orbitals for which $(n+l)$ is lower. In case, if $(n+I)$ is same, it goes first in that orbital for which $n$ is lower.

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