Iron is an element. It is made of only one type of atom ... A few of these elements can be found pure in a natural state. For example, graphite and diamond can be found in rocks in the Earth ...

These elements tend to come from two specific areas of the periodic table: the d-block metals like cobalt, nickel, and iron, and the f-block actinides lanthanides, which include the rare-earth ...

Iron is the main ingredient in various forms of iron and steel, but the various types of metals contain other elements as well. Sometimes these elements are unwanted; other times they're ...