Principal,azimuthal and magnetic quantum numbers are respectively related to

If three electrons could be accommodated in an orbital,then the element with atomic number $50$ will belong to:-

Show the distribution of electrons in an oxygen atom (atomic number $8$) using an orbital diagram.

For a magnetic quantum number $m = 0, \pm 1$,the value of the principal orbital (azimuthal quantum number $l$) corresponds to which subshell,and what is the minimum principal quantum number $n$ required for this set?

How are atomic orbitals (electrons) identified or distinguished?

In the $n^{th}$ quantum level,the number of electronic subshells is