Question

Match the particle with its characteristic.

	Column - I		Column - I
A.	$\alpha$-particle	p.	Slow moving
B.	Isobar	q.	High penetration power
C.	$\gamma$-ray	r.	Same atomic mass
D.	$\beta$-particle	s.	Consists of electron

• A. $A-P,B-r,C-p,D-s$
• B. $A-p,B-q,C-r,D-s$
• C. $A-r,B-s,C-p,D-q$
• D. $A-s,B-r,C-p,D-q$

Answer 1

The correct option is A $A-P,B-r,C-p,D-s$

$\alpha$-particle is a slow-moving particle as it has high mass and charge.
Isobars have the same atomic mass. They have a different number of protons, neutrons and electrons but the sum of the number of protons and neutrons is the same. Thus, they have the same number of nucleons.

${}_{18}^{40}Ar$ and ${}_{19}^{40}K$ are isobars.
$\gamma$-rays high penetration power as they are massless and charge less.
$\beta$-particle consists of electron and is represented as ${}_{-1}^0\beta$

Hence, option A is correct.