For an electron in the $d$-orbital, the orbital angular momentum is

Which of the following sets of quantum numbers is not possible for an electron?

If the number of radial nodes in an $s$-orbital is $(n - 1)$,and the question asks for the orbital where the number of nodes is $(n - 1)$,which orbital corresponds to the given expression $(n - 1)$?

Phosphorus has three unpaired electrons according to

After filling the $4d$ orbitals,an electron will enter in:

The graph showing the variation of probability density,$\psi^2(r)$ with the distance of the electron from the nucleus,$r$ is given below. This represents: