How can you tell if an element has been reduced?

Answer 1

The reactant that reduces another atom

Answer 2

it has more electrons in the product than in the reactant

Answer 3

It's oxidation state is higher in the product than in the reaction.

Answer 4

The element reduced is the one that gains electrons.

You see that by looking up the oxydizing numbers of all substances before and after the reaction. The one whose number is reduced (ex: from 2+ to 1+) is the element reduced.

Answer 5

the reactant that has the atom that gets oxidized

Answer 6

The oxidant is being reduced by the reductant while this reductant is oxidized by the first (oxidant).

Answer 7

In a redox reaction the reducing agent is the agent that is oxidized. Or put another way, the reducing agent is the one that is losing electrons.

Answer 8

Reduces another atom