Question

When an atom in a reactant gains electrons, what happens to its oxidation number?

Answer 1

Answer: When an atom in a reactant gains electrons Its oxidation number decreases.

Explanation:

Oxidation number decreases when an atom gains an electrons. This type of reaction is called Reduction reaction. In this number of electrons increases in an atom.

For example:

$Fe^{3+}+1e^-\rightarrow Fe^{2+}$

Here iron's oxidation state change to from+3 to +2 by gaining one electron.

Answer 2

The answer is "C" #PLATOLIVEZMATTER.