Changes

A shiny, [[solid]] substance that conducts heat and electricity, such as [[iron]].  They contrast with the [[nonmetal]]s, which are brittle, non-conductive, and dull. It is very difficult, if not impossible, to break metals because of their properties of ductility and malleability.  

A shiny, [[solid]] substance, such as [[iron]].  They contrast with the [[nonmetal]]s. It is very difficult, if not impossible, to break metals. Except when they are very easy to break, as in the case of [[aluminium]], [[lead]], cast [[iron]], [[tin]], [[copper]], [[gold]], [[silver]], and many others.

Also, variety of rock and roll known for its bone crushing riffs and facemelting guitar solos.

 

Metal is a variety of rock and roll known for its bone crushing riffs and facemelting guitar solos.