After filling the $4d$ orbitals,an electron will enter in:

The quantum numbers for the outermost electron of an element are given as $n = 2, l = 0, m = 0, s = +\frac{1}{2}$. The element is

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

Find the number of electrons in the ground state of $Pd$ $(Z = 46)$ with $l = 2$.

Identify the element from the following having six unpaired electrons in its observed electronic configuration.

Which of the following are correct?
$(1)$ Electron density in $XY$ plane for $d_{x^2-y^2}$ orbital is zero.
$(2)$ The energy of $3p$-orbital is higher than the energy of $2p$-orbital.
$(3)$ $3p_z$-orbital has one angular node.
$(4)$ $4f$-orbital has no radial node.