Metals

Metals are classified as light metals and heavy metals in terms of their density. Light metals have a density of less than 5.0 g/ cm3 (Li, K, Ca, Al etc). Heavy metals are those which have a density of more than 5.0 g/ cm3. Lithium is the lightest metal with density of 0.53 g/cm3 while Osmium is the heaviest metal with density of 22.5 g/cm3.