WAEC SSCE - Physics - 1995 (Objective)

Question 1 Report

Which of the following are emitted from a radioactive substance without altering either the nucleon number or the proton number of the substance?

Protons

Neutrons

Gamma rays

Beta particles

Alpha particles

Answer Details

Gamma rays are emitted from a radioactive substance without altering either the nucleon number or the proton number of the substance. Gamma rays are high-energy photons that are emitted from the nucleus of a radioactive atom. Unlike alpha and beta particles, which are particles that are emitted from the nucleus during radioactive decay, gamma rays are pure energy and do not have mass or charge. Therefore, they do not change the identity of the atom, but they can be harmful to living organisms if they are exposed to high levels of gamma radiation.






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