JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
For \(Na^+ , Mg^{2+}, F^-\) and \(O^{2-}\); the correct order of increasing Ionic radii is
- A \({O^{2 - }} < {F^ - } < N{a^ + } < M{g^{ 2+}}\)
- B \(N{a^ + } < M{g^{ 2+}} < {F^ - } < {O^{2 - }}\)
- C \(M{g^{ 2+}} < N{a^ + } < {F^ - } < {O^{2 - }}\)
- D \(M{g^{ 2+}} < {O^{2 - }} < N{a^ + } < {F^ - }\)
Answer & Solution
Correct Answer
(C) \(M{g^{ 2+}} < N{a^ + } < {F^ - } < {O^{2 - }}\)
Step-by-step Solution
Detailed explanation
All species are isoelectronic \((10e^-)\). isoelectronic series, when negative charge increases the radius of ion increases \(\therefore M{g^{ 2+}} < N{a^ + } < {F^ - } < {O^{2 - }}\)
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