The total number of electrons present in all the $s$-orbitals,all the $p$-orbitals,and all the $d$-orbitals of the cesium ion $(Cs^+)$ are respectively:

The set of orbitals filled just after the filling of electrons in an atom with atomic number $Z = 56$ is:

The valence shell of calcium contains

$1s^2 2s^2 2p^6 3s^2$ is the electronic configuration of the metal

The probability of finding electrons in $d_{xy}$ orbital is

Consider the following statements :
$(a)$ Electron density in the $xy$ plane in $3d_{x^2-y^2}$ orbital is zero.
$(b)$ Electron density in the $xy$ plane in $3d_{z^2}$ orbital is zero.
$(c)$ $2s$ orbital has one nodal surface.
$(d)$ For $2p_z$ orbital,$yz$ is the nodal plane.
Select the incorrect statements $:-$