Respuesta :

Because Nickel is above copper in the reactivity series.

All metal ions receive positive charge as they lose negative electrons; Metals that give up electrons more than others are more reactive.

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Why is nickel more reactive then copper?

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If we notice in reactivity series of metal, we can observe that the metals which are listed above have more reactivity then those in downwards.

And, if we notice carefully we can see that nickel is above copper, which nickel is more reactive then copper.

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