WAEC Physics 2025 Objective — Question 20
Question 20 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
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Which of the statements is correct about the nucleus of an atom? I. It is centrally located in the atom II. It contains the nucleons and electrons III. It is positively charged due to the protons IV. It decays when there is instability inside
- A. I, II and IV only
- B. I, III and IV onlyCorrect
- C. I, II and III only
- D. I and II only
Explanation
The nucleus is centrally located in the atom, is positively charged due to the protons, and an unstable nucleus undergoes radioactive disintegration to become more stable. (Statement II is false — electrons orbit outside the nucleus.)
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