In the sixth period, the orbitals that are filled are
Question:

In the sixth period, the orbitals that are filled are

 

  1. $6 \mathrm{~s}, 5 \mathrm{f}, 6 \mathrm{~d}, 6 \mathrm{p}$

  2. $6 \mathrm{~s}, 6 \mathrm{p}, 6 \mathrm{~d}, 6 \mathrm{f}$

  3. $6 \mathrm{~s}, 5 \mathrm{~d}, 5 \mathrm{f}, 6 \mathrm{p}$

  4. $6 \mathrm{~s}, 4 \mathrm{f}, 5 \mathrm{~d}, 6 \mathrm{p}$


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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