What is number of radial nodes in 4f orbital?

Radial node is a spherical surface where the probability of finding an electron is zero.
The equation for finding radial node is n-l-1.
Angular node is a plane that passing through the nucleus. Angular node is equal to the azimuthal quantum number (l).
In a 4f orbital, the principal quantum number is 4 and the angular quantum number is 3 (n=4,l=3).
Therefore, the number of angular nodes present in 3.
Here, the value of n will be 4. This means there will be no radial nodes present in 4f orbital.

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