Answer: electrons
Explanation:
Oxidation is the loss of electrons during a reaction by a molecules, atom or ion. Oxidation occurs when the oxidation state a molecule, atom or ion is increased. The opposite process is called reduction , which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases
We no longer use atoms of the same elements are identical in size, mass and properties.
The answer to this would be b ,