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← ScienceWhich outcome results when magnesium oxide forms in a furnace?
A)Significant heat release (exothermic reaction)✓
B)A highly conductive network forms
C)Metallic magnesium remains unreacted
D)Magnesium peroxide becomes the major product
💡 Explanation
Magnesium oxide formation releases energy because the large electronegativity difference causes **ionic bonding**, resulting in a substantial lattice energy release. Therefore, the reaction is exothermic, rather than endothermic, or forming peroxide instead, with unreacted magnesium being thermodynamically unfavored.
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