A strong oxidizing agent strongly attracts electrons and gets reduced. An oxidizing agent is generally represented by halogens or a substance that consists of oxygen. It can readily give it away to another substance. The oxidation state of these substances decreases.
Halogens are considered efficient oxidizing agent because they support combustion. Among halogens, fluorine is the strongest oxidizing agent. Atomic oxygen and hydrogen peroxide are observed as powerful oxidizing agents; hydrogen peroxide makes a particularly effective rocket fuel. Strong oxidizing agents can be used as antiseptics and bleaches. The strengths of oxidizing agents are measured using their standard electrode potential.