$N a^{+}, M g^{2 +}, A l^{3 +}$ and $S i^{4 +}$ are isoelectronic ions. Their ionic size follows the order:

N a^{+} < M g^{2 +} < A l^{3 +} < S i^{4 +}

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N a^{+} > M g^{2 +} < A l^{3 +} > s i^{4 +}

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N a^{+} < M g^{2 +} > A l^{3 +} > S i^{4 +}

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N a^{+} > M g^{2 +} > A l^{3 +} > S i^{4 +}

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Solution

The correct option is A $N a^{+} < M g^{2 +} < A l^{3 +} < S i^{4 +}$
Ionic size of cation $\times \frac{1}{c h a r g e}$
So, the order is
$N a^{+} < M g^{2 +} < A l^{3 +} < S i^{4 +}$
Option A is correct.

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Similar questions

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