When magnesium combines with oxygen, the reaction involves
a. a conversion of protons into electrons.
b. sharing of electrons between mg and o.
c. transfer of electrons from mg to o.
d. transfer of electrons from o to mg.

The correct answer is option c. transfer of electrons from Mg to O.

Explanation:

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When Magnesium (Mg) reacts with oxygen (O), magnesium oxide is formed.

This reaction is spontaneous and occurs with oxidation number +2 of magnesium and oxidation number -2 of oxygen. It is an ionic union, so magnesium transfers its electrons to oxygen.

We conclude that the correct answer is option c. transfer of electrons from Mg to O.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.