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JAMB Chemistry 1992 Question 9

Question 9

Atomic Structure

The nucleus of the isotope tritium, contains

  1. A.two neutrons with no protons
  2. B.one neutron and one proton
  3. C.two neutrons and one proton
  4. D.two neutrons, one proton and one electron.
Show the answer and explanation

Answer: C (two neutrons and one proton)

Explanation

Tritium is hydrogen-3: 1 proton (as for all hydrogen) and 3 − 1 = 2 neutrons. Electrons are outside the nucleus.