alpha < beta < gamma.
Gamma rays are parts of electromagnetic spectrum.
1. Gamma rays travel with the speed of light with maximum velocity.
2. Gamma rays do not have mass have maximum penetrating power.
Beta rays are negatively charged and have negligible mass.
1. Neutron is divided into proton and electron on emission of beta particles.
2 .Beta particles have less mass and very high velocity, so their penetrating power is more than alpha particles.
Alpha rays are positively charged it contain high energy Helium nucleus with 2 proton and 2 neutron.
1. Mass of Alpha rays are 4u
2. Alpha rays are heavier and maximum charged than beta and gamma particles.
3.Alpha particles have least penetration power it can't travel more than 10-18 cm.
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