The group 4 elements carbon, silicon, germanium, tin, and lead are a mix of metals, metalloids, and non-metals that show considerable diversity in their properties. All of the group 4 elements have four valence electrons. They have a wide range of melting points from carbon's 3730°C to tin's 232°C. The group 4 elements have many important uses, such as diamonds from carbon, electronics from silicon, tin cans, and leaded petrol from lead.