The heaviest metal

The heaviest metal osmium is a gray-blue metal with high hardness and good wear resistance.

The most prominent feature of osmium is not high hardness, but the heaviest metal. Found in 1804.

The iridium pen we usually use has a silver-white small round particle, the tip of which is less than 1 mm, and this small round particle is made of osmium alloy. Osmium is a gray-blue metal with high hardness and good wear resistance. So it is more suitable to use it as a nib. Because of this excellent characteristic, osmium can also be used as a bearing for clocks and important instruments, and its life will be very long.

The most prominent feature of osmium is not high hardness, but the heaviest metal. Osmium weighs 22.7 grams per cubic centimeter, that is, osmium weighs 22.7 tons per cubic meter. Compared with osmium, the density of iron in nature is only one-third and that of lead is only half.

Osmium is a very stable metal with a melting point of 2700℃. Not only is it insoluble in ordinary acids, but even aqua regia (a mixed acid made of 1 volume concentrated nitric acid and 3 volumes concentrated hydrochloric acid) with the strongest solubility can't do anything about it. Metal osmium is so stable, but powdered osmium is very active. It will gradually be oxidized at room temperature.

By the way, osmium was discovered by British chemist Tennant in 1804.

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