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Classification of Elements and Periodicity in Properties
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24/08/2021 10:16 am
Topic starter
Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2–, S2–, N3–, P3–?
(a) O2– < N3– < S2– < P3–
(b) O2–< P3– < N3– < S2–
(c) N3– < O2– < P3– < S2–
(d) N3– < S2– < O2– < P3–
1 Answer
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24/08/2021 10:19 am
Correct answer: (a) O2– < N3– < S2– < P3–
Explanation:
For isoelectronic species ionic radii decreases as the charge on ion decreases. Further on moving down in a group ionic radii increases. Hence the correct order is O2– < N3– < S2– < P3–