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JAMB Chemistry 2012 Question 9

Question 9

Atomic Structure

A hydrogen atom which has lost an electron contains

  1. A.one proton only
  2. B.one neutron only
  3. C.one proton and one neutron
  4. D.one proton, one electron and one neutron.
Show the answer and explanation

Answer: A (one proton only)

Explanation

An ordinary hydrogen atom has one proton, one electron and no neutron; when it loses the electron, only the proton (H+) remains.