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JAMB Chemistry 2011 Question 8

Question 8

Atomic Structure

An isotope has an atomic number of 15 and a mass number of 31. The number of protons it contains is

  1. A.16
  2. B.15
  3. C.46
  4. D.31
Show the answer and explanation

Answer: B (15)

Explanation

The atomic number is the number of protons: 15.