As per the modern periodic law,the physical and chemical properties of elements are periodic functions of their

The number of angular and radial nodes of $4d$ orbital respectively are

In the ground state of atomic $Fe \,(Z = 26)$,the spin-only magnetic moment is ...... $\times 10^{-1} \,BM$. (Round off to the nearest integer).
$[$Given $: \sqrt{3} = 1.73, \sqrt{2} = 1.41]$

Indicate the number of unpaired electrons in: $(a)$ $P$,$(b)$ $Si$,$(c)$ $Cr$,$(d)$ $Fe$ and $(e)$ $Kr$.

The number of orbitals associated with quantum numbers $n=5, m_s=+\frac{1}{2}$ is

The number of nodal planes (planes of zero electron density) in the $d_{xy}$ orbital is: