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JAMB Chemistry 2013 Question 8

Question 8

Radioactivity

The radioactive emission with the least ionization power is

  1. A.α-particles.
  2. B.X-rays.
  3. C.γ-rays.
  4. D.β-particles.
Show the answer and explanation

Answer: C (γ-rays.)

Explanation

Gamma rays have no charge and no mass, so they ionise least (but penetrate most); alpha particles ionise most.