WAEC Chemistry 2020 Objective — Question 44
Question 44 of 50 from the West African Examinations Council (WAEC) Chemistry 2020 Objective paper, with the correct answer and a full explanation.
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How many electrons does 31/15 P3- contain?
- A. 12
- B. 15
- C. 16
- D. 18Correct
Explanation
Proton number=15. Electron=15+3=18 (since P3- has gained 3 extra electrons). Neutron number=31-15=16.
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