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In the solid state, MgO has the same structure as that of sodium chloride. The number of oxygens surrounding each magnesium in MgO is

1. 6
2. 1
3. 2
4. 4

Correct answer: 6

Solution

In the NaCl structure, each cation is surrounded by six anions in an octahedral arrangement. Similarly, in MgO, each magnesium ion is surrounded by six oxygen ions.

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