The angular momentum of a $p$-orbital electron is given by:

What is the maximum number of electrons that can be accommodated in a shell with principal quantum number $n = 4$?

Total number of unpaired electrons in an atom of atomic number $29$ is

Although no currently known element contains electrons in $g$ orbitals in the ground state,it is possible that such an element will be found or that electrons in excited states of known elements could be in $g$ orbitals. For $g$ orbitals,$l = 4$. What is the lowest value of $n$ for which $g$ orbitals could exist? What are the possible values of $m_l$? How many electrons could a set of $g$ orbitals hold?

The number of radial nodes of $3s$ and $2p$ orbitals are respectively.

The electronic configuration of chromium ($Cr$,$Z=24$) is: