When the oxidation number of an element decreases over the course of a reaction, that element has been
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is it b @blackeistien238821
do you kno @Bozhena
Which of the following describes an element that is reduced in a reaction?
It acts in the reactant that is the reducing agent.
It has a decrease in its oxidation number.
Cd yields Cd2+ + 2e−
Zn + Cu2+ yields Zn2+ + Cu
@Bozhena what about this
@blackeistien238821 do you kno
Red is when an elment GAINS e'.
So if you have Cd yields Cd2+ + 2e−
It means that Cd ox.n 0 passed to Cd++ ox.n +2. When you see + it means atom had something less, in this case he had 2è less than Cd 0. So Cd++ GAINS two electrons and become Cd 0.
Try to do the next reaction
so the answer would be a?
you tell me.
If an element get reduced whan it gains electrons, and i told you that Cd++ gains two e' to get Cd.