The molar mass of the chemical element iron is 55.845 grams per mole. Iron is represented by the symbol Fe. It is designated with the atomic number 26 on the periodic table.
Iron is one of the most-common elements in the galaxy, featuring prominently in terrestrial planets such as Mercury, Venus and Mars. This is because stars produce nickel-56 as a byproduct of fusion and nickel-56 eventually decays to iron. Iron is the most-common element on Earth and has been used by humans as a functional metal since the Iron Age, when copper alloys became a common method of smelting.