What is the value of azimuthal quantum number for '$g$' subshell?

When the azimuthal quantum number has a value of $l = 0$,the shape of the orbital is

The set of quantum numbers for the $19^{th}$ electron in chromium $(Cr)$ is:

The quantum number which may be designated by $s$,$p$,$d$ and $f$ instead of numbers is

The number of electrons present in all the completely filled subshells having $n=4$ and $s=+\frac{1}{2}$ is . . . . . . . (Where $n=$ principal quantum number and $s=$ spin quantum number)

Which set has the same number of unpaired electrons in their ground state?