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← ScienceWhich risk increases when magnesium oxide (MgO) forms?
A)Exothermic reaction heat propagation✓
B)Endothermic reaction rate decrease
C)Metallic bond electron delocalization
D)Convalent bond dipole moment increase
💡 Explanation
Exothermic reactions occur because *ionic bond* formation in magnesium oxide (MgO) releases considerable heat; therefore, a runaway reaction becomes more likely, rather than endothermic rate slowing or increased electron delocalization from metallic bonding/dipole moments.
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