JAMB Physics 1991 Question 48

Question 48

Radioactivity and Nuclear Physics

In a nuclear fusion process, four protons each of mass Mp were fused to produce a nucleus X of mass Mx. Which of the following equations is CORRECT?

  1. A.4Mp > Mx
  2. B.4Mp = Mx
  3. C.4Mp < Mx
  4. D.Mp = Mx
Show the answer and explanation

Answer: A (4Mp > Mx)

Explanation

Fusion releases energy, which comes from a loss of mass, so the product is lighter than the four protons together.