How can you tell if an element has been reduced? A. It has a positive oxidation state in the product. B. The number of its electrons has not changed in the reaction. C. It has fewer electrons in the product than in the reactant. D. It has more electrons in the product than in the reactant. SUBMIT

Considering the definition of a reduced element, the correct answer is option D. an element has been reduced when it has more electrons in the product than in the reactant.

Redox reaction

Oxidation and reduction reactions always occur simultaneously, which is why they are generally known as oxidation-reduction reactions or redox reactions.

For a redox reaction to exist, there must be an element in the system that gives up electrons and another that accepts them:

The reducer is that chemical element that tends to give up electrons from its chemical structure to the medium, leaving it with a higher positive charge than it had.
The oxidant is the chemical element that tends to capture these electrons, leaving it with a lower positive charge than it had.

When a reducing chemical element gives up electrons to the medium, it becomes an oxidized element.

Similarly, it is said that when a chemical element captures electrons from the environment, it becomes a reduced element.

Summary

In summary, the correct answer is option D. an element has been reduced when it has more electrons in the product than in the reactant.

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