* Iron (Fe): This is a transition metal, and its symbol is Fe.
* Chlorine (Cl): This is a halogen, and its symbol is Cl.
There are two main forms of iron chloride:
* Ferrous chloride (FeCl₂): This contains one iron atom and two chlorine atoms.
* Ferric chloride (FeCl₃): This contains one iron atom and three chlorine atoms.