järnatomen

The järnatom, or iron atom, is a chemical element with the symbol Fe and atomic number 26. Iron is a metal that is abundant in the Earth's crust and core. It is known for its strength, ductility, and malleability, making it a crucial material in construction, manufacturing, and engineering. In its elemental form, iron is a lustrous, silvery-white metal.

Iron plays a vital biological role, most notably as a component of hemoglobin in red blood cells, which is responsible for transporting oxygen throughout the body. It is also involved in numerous enzymatic reactions. Dietary iron deficiency leads to anemia, a common health issue.

Chemically, iron can exist in several oxidation states, with +2 (ferrous) and +3 (ferric) being the most common. Iron readily reacts with oxygen to form iron oxides, commonly known as rust, which is a reddish-brown, flaky substance. This process, known as oxidation or rusting, degrades iron over time unless protective coatings are applied.

Iron has been used by humans for millennia, with the Iron Age marking a significant period of technological advancement. Its magnetic properties also make it important in various applications, from compass needles to electric motors.