An alloy is a mixture of two elements, one of which is a metal. Alloys often have more useful properties than the metals they contain.
Copper is purified by electrolysis. Electricity is passed through solutions containing copper compounds, such as copper(II) sulphate. Pure copper forms on the negative electrode.
alloymain metal(s) in alloytypical use amalgam mercury dental fillings brass copper and zinc musical instruments, coins, door knockers solder lead and tin joining…