Iron has been known since antiquity; therefore, it is unknown who first discovered the element. Artifacts of smelted iron have been found and dated to be from as early as 3000 B.C. The symbol of iron is Fe, and its atomic number is 26. Iron is classified as a metallic element.
In its pure form, iron exists as a silvery-white metal than can easily rust when exposed to oxygen. It has a boiling point of 5182 degrees Fahrenheit and a melting point of 2800 degrees Fahrenheit. Its atomic weight is 55.847.
Iron is found throughout the universe and is essential to many forms of life. In humans, iron is an important part of hemoglobin, which is in the red blood cells. People who have low quantities of iron in their blood are considered anemic and can experience fatigue.