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Relation Between r and a

If the distan...

Question

If the distance between $N a^{+}$ and $C l^{-}$ ions in $N a C l$ crystal is $a$ pm, what is the length (in pm) of the cell edge?

2 a

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\frac{a}{2}

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4 a

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\frac{a}{4}

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Solution

The correct option is A $2 a$
If the distance between $N a^{+}$ and $C l^{-}$ ions in $N a C l$ crystal is $a$ pm, then the length of the cell edge is $2 a$ pm.

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