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JAMB Physics 2014 Question 45

Question 45

Radioactivity and Nuclear Physics

When an atom undergoes a beta decay, the atomic number of the nucleus

  1. A.decreases by one.
  2. B.increases by one.
  3. C.becomes zero.
  4. D.remains unchanged.
Show the answer and explanation

Answer: B (increases by one.)

Explanation

In beta decay a neutron changes into a proton and an electron is emitted, so the atomic number goes up by one.