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Question: Answered & Verified by Expert
Total number of angular nodes of orbitals associated with third shell $(n=3)$ of an atom is
ChemistryStructure of AtomAP EAMCETAP EAMCET 2023 (19 May Shift 1)
Options:
  • A $3$
  • B $4$
  • C $2$
  • D $1$
Solution:
2611 Upvotes Verified Answer
The correct answer is: $3$
Total number of angular nodes $=l$, for a given orbital. For $n=3$, there will be three subshells having $3 \mathrm{~s}$, $3 \mathrm{p}$ and $3 \mathrm{~d}$ orbitals.
For $3 \mathrm{~s}, l=0$, so zero angular nodes.
For $3 \mathrm{p}, l=1$, so one angular nodes.
For $3 \mathrm{~d}, l=2$, so two angular nodes.
$\Rightarrow$ Total angular nodes $=0+1+2=3$

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