The electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$. This represents:

The total number of magnetic quantum numbers for a $d$-orbital is given by

The electronic configuration,which obeys Hund's rule for the ground state of carbon atom is

The minimum number of quantum numbers required to specify an orbital in an atom is

What would be the electronic configuration of $Cs (Z=55)$ in each case?
$(a)$ If there were three possibilities of the electron spin.
$(b)$ If the quantum number,$l$,could have the value $n$,and if all the rules governing electron configuration were otherwise valid.

Identify the nodal planes for the $p_x$,$p_y$,and $p_z$ orbitals.