👉 The term "oxidizable" refers to a substance that can be reduced in an aqueous solution. It is a chemical reaction where atoms or molecules are lost electrons from their original state, which creates a more stable state and allows them to react with another substance. Oxidizable substances include metals such as iron (Fe), aluminum (Al), magnesium (Mg), and lead (Pb). They can also be oxidized by other substances like hydrogen gas (H2) or oxygen gas (