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

For $3d_{z^2}$ calculate the value of $n, \ell, m$ and $s$.

Which of the following rules or principles states that "No two electrons in an atom can have the same set of four quantum numbers"?

The number of electrons present in all the completely filled subshells having $n=4$ and $s=+\frac{1}{2}$ is . . . . . . . (Where $n=$ principal quantum number and $s=$ spin quantum number)

The atomic weight of an element is double its atomic number. If there are four electrons in the $2p$ orbital,the element is:

Write down about the Hund's rule.