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Question:
In the sixth period, the orbitals that are filled are
Correct Option: , 4
Solution:
As per $(n+\ell)$ rule in $6^{\text {th }}$ period, order of orbitals filling is $6 \mathrm{~s}, 4 \mathrm{f}, 5 \mathrm{~d}, 6 \mathrm{p}$.
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