As of 2014, there are 84 metal elements on the Periodic Table of Elements, four of which are unnamed at this time. Metals are one of three classifications of the elements: there are metals, nonmetals and metalloids. Named and unnamed elements are being added as more substances are discovered.
Metals are good conductors of heat and electricity and are easily shaped or malleable. Another property of metals is they are ductile and can be shaped into wire. Metals are very hard and often are shiny or lustrous. They are a solid at room temperature, with the exception of mercury, also called quicksilver. Metals combine with other metals through metallic bonding, in which they share one or more of the valence electrons, making an electron sea. It is the free movement of the electron sea that makes electricity easily conducted by metals.