Question

M + e- M-1 Has M lost or gained an electron?

Answer 1

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➷ As M now has a negative charge, that means it has more electrons than protons. This means that it has gained an electron

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Answer 2

Answer : The M element gained an electron.

Explanation :

As we know that in a redox reaction the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is a reaction in which a substance looses electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is a reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

The given balanced reaction is :

$M+e^-\rightarrow M^{-1}$

This reaction is a reduction reaction in which the element 'M' gain one electron and form $M^{-1}$.

Hence, the M element gained an electron.