The number of electrons which can be accommodated in an orbital is

For a $4p$-orbital,the number of radial and angular nodes,respectively,are

The electronic configuration of three elements $A$,$B$,and $C$ are given below. Stable form of $A$ may be represented by the formula:
$A : 1s^2, 2s^2, 2p^6$
$B : 1s^2, 2s^2, 2p^6, 3s^2, 3p^3$
$C : 1s^2, 2s^2, 2p^6, 3s^2, 3p^5$

The number of possible spatial orientations of an electron in an atom is given by its

Which of the following is the correct electronic configuration of $Cr$ (Chromium)?

For an electron in the $4f$ orbital,which of the following sets of quantum numbers is correct?