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Variable Oxidation States

What is the c...

Question

What is the co-ordination number of Na in $N a_{2} O$ ?

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Solution

The co-orination number of Na in $N a_{2} O$ is 4.
$N a^{+}$ ion is sorrounded by four oxide ions whereas $O^{2 -}$ ion is sorrounded by eight $N a^{+}$ ions. Thus, the coordination number of Na is 4.

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