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Gamma rays are the most penetrating radioactive emissions. The correct answer is C.

Answer;

Gamma rays

Gamma rays are the radioactive emissions with the most penetrating power.

Explanation;

  • Alpha, beta particles and gamma rays are the three main types of radiations emitted by unstable or radioactive isotopes.
  • Gamma radiation does not consist any particles but contain a photon of energy emitted from an unstable nucleus. Gamma radiation has no charge or mass, thus can travel farther through air than the other radiations.
  • Gamma is the most penetrating radiation with alpha being the least penetrating.

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