What are the four ways oxidation would take place?

Oxidation is a chemical reaction that involves the loss of electrons or an increase in oxidation state. Among the methods by which oxidation can take place, adding oxygen is a classic and widely recognized process. When oxygen is added to a substance, it can combine with another element or compound, leading to the formation of oxides. This not only often increases the oxidation state of the element being oxidized but also allows for the removal of electrons from that element.

For instance, in the oxidation of iron to form rust (iron oxide), oxygen combines with iron, resulting in the oxidation of iron. The concept of oxidation is deeply tied to the transfer of electrons; thus, the addition of oxygen typically signifies a clear pathway for such processes.

While the other factors also participate in oxidation reactions, adding oxygen is one of the most straightforward and intuitive methods to visualize oxidation occurring. It aligns with the traditional definition of oxidation and is a fundamental concept in both organic and inorganic chemistry.