WAEC Chemistry 2021 Objective — Question 34
Question 34 of 50 from the West African Examinations Council (WAEC) Chemistry 2021 Objective paper, with the correct answer and a full explanation.
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34. Which of the following species has the largest ionic radius?
- A. S2-Correct
- B. Cl-
- C. K+
- D. Ca2+
Explanation
S2- has the lowest effective nuclear charge for its electron count among these isoelectronic-like species, giving it the largest ionic radius.
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