Write the increasing order of energy for $2p, 3p, 4p, 5p$ orbitals.

In an element with atomic number $(Z) = 25$,the number of electrons with $(n+l)$ value equal to $3$ and $4$ are $x$ and $y$ respectively. The value of $(x+y)$ is

If the outermost electrons of an element are represented as $(a)$ $3s^1$,$(b)$ $2p^3$,and $(c)$ $3p^5$,what will be the atomic numbers of these elements?

If the electronic configuration of a nitrogen atom were $1s^7$,its energy would be lower than that of the ground state configuration $1s^2\,2s^2\,2p^3$ due to being closer to the nucleus. However,the $1s^7$ configuration is not observed because it violates which of the following rules?

Which quantum number is not related to the Schrodinger equation?

Consider the Argon atom. For how many electrons does this atom have $m = 1$?