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Q.
The principal and azimuthal quantum number of electrons in $4 f$ orbitals are
Structure of Atom
Solution:
For $4 f$ electron
[Principal quantum number $(n)=4$ Azimuthal quantum number $(l)=3$]
$\begin{bmatrix}1=0 & s \\I=1 & p \\1=2 & d \\l=3 & f\end{bmatrix}$