Question

Match the following

	Column I		Column II
A	Photon	(i)	Value is $4$ for $N$ shell
B	Electron	(ii)	Probability density
C	$\Psi 2$	(iii)	Always positive value
D	Principal quantum number $n$	(iv)	Exhibits both momentum and wavelength

Answer 1

Analyzing and understanding all the options given

A) Photon $\to$ photons are energy packet of electromagnetic radiation whose energy is given by:

$E=hv=\frac{hc}{\lambda }$

Photons have particle nature as well as wave nature thus exhibit both momentum and wavelength.

B) Electron $\to$ Electrons have negative charge and have both particle and wave nature. Thus, exhibit both momentum and wavelength.

C) ${\Psi }^2$ represents probability density for an electron and always has positive values.

D) Principal quantum number $\to$ Principal quantum number $(n=4)$ represents the $N-$shell and always has positive values.

Hence, the correct answer is :

	Column I		Column II
A	Photon	(iv)	Exhibits both momentum and wavelength
B	Electron	(iv)	Exhibits both momentum and wavelength
C	$\Psi 2$	(ii) (iii)	Probability density and Always positive value
D	Principal quantum number $n$	(i) (iii)	Value is $4$ for $N$ shell and Always positive value