Which rule is violated in the given electronic configuration?

Electrons should be filled in orbitals according to their increasing order of energy. This statement is related to .....

Degenerate atomic orbitals have

Which of the following sets of quantum numbers is correct for an electron in $4f$ orbital?

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

If the $Aufbau$ rule were not followed,then $Ca$ would belong to which block?