Iron is abbreviated as Fe on the periodic table of elements and is considered to be a ferrous metal in group 8. Ferrous metals are commonly known for being magnetic, and they rust in the presence of oxygen.
Iron was one of the first metals forged and worked by humans thousands of years ago. It is a brittle metal, and it wasn't until much later that humans learned to make steel, drastically increasing the metal's strength and flexibility. In addition to being an excellent building material, small amounts of iron are essential to aerobic life. Iron helps red blood cells transport oxygen.