Which of the following option shows the correct symbol and charge of elements present in $C a {C l}_{2}$ ?

Ca and Cl^2-

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Ca²⁺ and Cl^-

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Ca²⁺ and Cl^2-

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Ca⁺ and Cl^-

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Solution

The correct option is B
Ca²⁺ and Cl^-

Calcium has valency +2 and chloride has -1, so 2 chloride ions combine with calcium to form $C a {C l}_{2}$ .

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The correct order of ionic size of the species $K^{+}, C l^{-}, C a^{2 +}$ and $S^{2 -}$ is:

K^{+}, C l^{-}, S^{2 -}, C a^{2 +}

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