Which of the following orbitals is non-directional?

What is the total spin for the electronic configuration of fluorine $(F)$?

An electron is in one of the $3d$ orbitals. Give the possible values of $n, l,$ and $m_l$ for this electron.

Statement $A$: In a potassium atom,the $19^{th}$ electron enters the $4s$-orbital instead of the $3d$-orbital.
Reason $R$: The $(n + l)$ rule is followed to determine the minimum energy of an orbital.

Which quantum number determines the shape of the subshell?

The energy of a $2p$ orbital in a multi-electron atom is