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 ...

Some substances, like particles of this iron, contain only one kind of atom. Iron is an element. It is made of only one type of atom: iron atoms. Sulfur is another element. It contains only sulfur ...

Iron is one of the main elements found in the Earth's inner core ... propagating at supersonic speeds through the iron sample. The shock wave induces extreme pressure and temperature conditions ...