What is the difference between $2p_x, 2p_y,$ and $2p_z$ orbitals?

(N/A) The difference lies in their orientation in space and their magnetic quantum number $(m_l)$ values. They are oriented along the $x, y,$ and $z$ axes respectively. Their $m_l$ values are distinct and can be any value from the set ${+1, 0, -1}$ depending on the convention used.