First slide

Radio activity

Question

Which of the following is a correct statement?

Easy

A

Beta rays are same as cathode rays
B

Gamma rays are high energy neutrons
C

Alpha particles are singly ionized helium atoms
D

Protons and neutrons have exactly the same mass

Solution

Both the $β$ -rays and the cathode rays are made up of electrons. $γ -$ rays are EM waves, $α$ -particles are doubly ionized helium atoms and
protons and neutrons have approximately the same mass.

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