Iron (Fe) — Element Properties, Uses & Facts
Overview
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.
Electron configuration
The electron configuration of Iron is [Ar] 3d6 4s2, with electron shells of 2, 8, 14, 2.
Physical and chemical properties
Iron is classified as a transition metal. It has an atomic mass of 55.845 and exists as a solid at standard conditions, appearing as lustrous metallic with a grayish tinge.
Real-world uses of Iron
As a transition metal, Iron is typically used in alloys, industrial manufacturing, electronics, or as a catalyst in chemical reactions.
Interesting facts about Iron
- Iron has the atomic number 26 and chemical symbol Fe.
- It belongs to period 4, group 8 of the periodic table.
- Iron was known to humans since 5000 BC.
Explore Iron interactively
Want to compare Iron with other elements or see it highlighted on the full table? Open the interactive periodic table and click on Fe to explore properties, trends, and neighboring elements. You can also test your knowledge with our periodic table quiz game.
What is Iron used for?
As a transition metal, Iron is typically used in alloys, industrial manufacturing, electronics, or as a catalyst in chemical reactions.
What is the atomic number of Iron?
The atomic number of Iron is 26, meaning it has 26 protons in its nucleus.
What is the electron configuration of Iron?
The electron configuration of Iron is [Ar] 3d6 4s2.
Is Iron a metal, nonmetal, or metalloid?
Iron is classified as a transition metal.