What is the electronic configuration of $Cr$?

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

Which of the following statements are correct for an electron that has $n = 4$ and $m = -2$?

Consider the hypothetical situation where the azimuthal quantum number,$l$,takes values $0, 1, 2, \ldots, n+1$,where $n$ is the principal quantum number. Then,the element with atomic number

The energy of an electron of $2p_y$ orbital is

Which one represents an impossible arrangement of quantum numbers $(n, l, m, s)$?