Post-UTME Physics 2019 Objective — Question 8
Question 8 of 20 from the Post-UTME Screening (Post-UTME) Physics 2019 Objective paper, with the correct answer and a full explanation.
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The mass number of a nucleus is the
- A. total number of its protons and neutronsCorrect
- B. number of its protons
- C. mass of its protons and electrons
- D. total mass of its protons and electrons
Explanation
Mass number (A) = number of protons + number of neutrons (nucleons) in the nucleus.
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