* A halogen: Chlorine belongs to Group 17 of the periodic table, also known as the halogens. This group includes fluorine, bromine, iodine, and astatine.

* A nonmetal: Chlorine is a nonmetal, meaning it lacks the properties of metals like conductivity and malleability.

* A diatomic element: Chlorine exists naturally as a molecule of two chlorine atoms bonded together (Cl₂).

* An oxidizing agent: Chlorine readily accepts electrons from other substances, causing them to become oxidized. This is why it's used as a disinfectant, killing bacteria by oxidizing their cells.

* An essential element: While chlorine can be dangerous in high concentrations, it's also essential for life. It's a component of table salt (NaCl) and is crucial for regulating fluid balance in the body.

So, depending on the context, you could say chlorine is an example of any of these things.