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Either osmium or iridium is the densest element. It's not entirely clear which; theoretical calculations predict that one is slightly denser and experiments show that the other is denser... but the difference is so small that it's possible that tiny errors in measurement could reverse the order.

Osmium in a metallic form is extremely dense, blue white, brittle and lustrous even at high temperatures, but proves to be extremely difficult to make.Osmium metal has the highest melting point and the lowest vapor pressure of the platinum family.One cubic metre of osmium would weigh about 22.65 tonnes!

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15y ago

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