List of top Chemistry Questions on Structure of atom asked in Punjab PMET

What is the wave number of $4^{th}$ line in Balmer series of hydrogen spectrum? $(R=1,09,677\,cm^{-1})$

An atom has electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{3} 4 s^{2}$, you will place it in

In hydrogen atom, energy of first excited state is $ -3.4\,eV$ . Then $KE$ of same orbit of hydrogen atom is

The mass of a photon with wavelength $ 3.6\,??$ is:

An electron with values $4, 2, -2$ and $+1/2$ for the set of four quantum numbers $ n,\,\,l,\,\,{{m}_{l}} $ and $ s $ respectively, belongs to:

The maximum number of electrons present in an orbit $ l=3 $ , is :

The shape of an orbital is determined by :