So two of these molecules, two of these ions give off those two electrons, forming our diatomic gas molecule, and the diatomic gas molecule evaporates into our environment. Now, let's look at a reduction reaction. This reduction reaction occurs in the following manner. Two sodium ions react with two electrons. When they hit this metal, they take up those two electrons, forming two sodium solid molecules or two moles of sodium solid molecules. Now, our net reaction is just an addition of this guy to this guy.