g Oxidation refers to Select one: a. an increase in oxidation number. b. a decrease in oxidation number. c. an increase in mass. d. an increase in the atomic number. e. a gain in the number of protons.

The correct alternative is "Option a".

Explanation:

Oxidation has become a mechanism whereby the physicochemical properties transform attributed to the formation of O₂.

The connection involving magnesium as well as O₂ requires the oxidation of the component named magnesium. Even before exposed to the air, silicon is oxidized as well as generates silicon dioxide.

Other possibilities are not connected to the scenario in question. So Choice A is the best option.

Outermost (valence) electrons

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.