A $\mathrm{p}$-subshell which consists of ${\mathrm{p}}_{\mathrm{x}},\mathrm{}{\mathrm{p}}_{\mathrm{y}}$ and ${\mathrm{p}}_{\mathrm{z}}$ orbitals contains only one electron. In which one of these three orbitals should the electron be located? Justify your answer.