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
Correct Answer: A
Solution :
Both the b-rays and the cathode rays are made up of electrons. g-rays are EM waves, a-particles are doubly ionized helium atoms and protons and neutrons have approximately the same mass.
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