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JAMB Chemistry 1983 Question 41

Question 41

Atomic Structure

The mass of an atom is determined by

  1. A.its ionization potential
  2. B.its electrochemical potential
  3. C.the number of protons and electrons
  4. D.the number of neutrons and protons
  5. E.the number of neutrons and electrons
Show the answer and explanation

Answer: D (the number of neutrons and protons)

Explanation

Electrons have almost no mass, so an atom's mass comes from the protons and neutrons in its nucleus.