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AnonymSep 23, 2013

Which thing is very heavy in world and which is light?

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    Sep 24, 2013

    The heaviest thing in the world is "Osmium". Its atomic number is 76 and has a density of 22.59 g/cm3. It is used as fountain pen tips, electrical contacts, and other applications where extreme durability and hardness is required. On the other hand the lightest thing in the world is "Aerogel". It is also known as "solid smoke". It is about 0.003 grams per cubic centimeter.

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    AnonymSep 24, 2013

    Osmium is the heaviest thing and Aerogel is the lightest.

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