Iron is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. |
It is by mass the most common element on Earth, forming much of Earth's outer and inner core.
It is the fourth most common element in the Earth's crust.
Iron metal has been used since ancient times, although copper alloys, which have lower melting temperatures,
were used even earlier in human history.