A) \[C{{l}^{-}},C{{a}^{2+}},{{K}^{+}},{{S}^{2-}}\]
B) \[{{S}^{2-}},C{{l}^{-}},C{{a}^{2+}},{{K}^{+}}\]
C) \[C{{a}^{2+}},{{K}^{+}},C{{l}^{-}},{{S}^{2-}}\]
D) \[{{K}^{+}},{{S}^{2-}},C{{a}^{2+}},C{{l}^{-}}\]
Correct Answer: C
Solution :
Order of ionic radii \[C{{a}^{2+}}<{{K}^{+}}<C{{l}^{-}}<{{S}^{2-}}\]in isoelectronic species as \[\frac{Z}{e}\] increases size decreases.
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