Metals are lustrous, malleable and ductile are good conductors of heat and electricity. They are solid at room temperature, except mercury which is a liquid. The physical properties of metals are explained on various parameters such as ductility, malleability, tensile, strength, etc. Based on physical properties, metals and non-metals are differentiated. The non-metals are either solids or gases except bromine which is a liquid. Under the subtopic chemical properties of metals, chemical reactions are discussed with oxygen gas, water, acids and other metal salts. Based on the reactivity series, the reactions and conditions depend. The reactivity series tops potassium as the most reactive and Gold as the least reactive.