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{{Element | name=Osmium | symbol=Os | anumber=76 | amass=190.2 amu | state=Solid | class=Transition Metals | cstructure=Hexagonal | color=Fine black powder or blue-gray solid | date=1803 | discname=Smithson Tennant and William Hyde Wollaston | origname=From the Greek ''osmê'', meaning ''odour'', due to its pungent smell. | uses=Used to tip gold pen points and instrument pivots (such as compass needles and clock bearings). Also used to make electric light filaments and for high temperature alloys and pressure bearings. | obtained=Produced as a by-product of [[nickel]] refining. }}

{{Element | name=Osmium | symbol=Os | anumber=76 | amass=190.2 amu | state=Solid | class=Transition Metals | cstructure=Hexagonal | color=Fine black powder or blue-gray solid | date=1803 | discname=Smithson Tennant and William Hyde Wollaston | origname=From the Greek ''osmê'', meaning ''odour'', due to its pungent smell. | uses=Used to tip gold pen points and instrument pivots (such as compass needles and clock bearings). Also used to make electric light filaments and for high temperature alloys and pressure bearings. | obtained=Produced as a by-product of [[nickel]] refining. }}

'''Osmium''' is a chemical [[element]] that is one of the [[platinum]] [[metal]]s.  It is the densest of all the natural elements.  Because pure osmium [[oxidize]]s to the extremely toxic osmium tetroxide, osmium is rarely used in its pure form. Osmium also has a very unique ability; it can apparently undergo osmosis. The unique electron structure of the Osmium³⁺ ion allows it to be pulled through a thin membrane to the other side, on the surface apparently similar to water undergoing osmosis. This ability to penetrate easily into the furthest reaches of the human body is what allows it to be so toxic to humans.<ref>Advanced Chemistry 'Chemical Storylines', Salters-Nuffield, 2001</ref>.

'''Osmium''' is a chemical [[element]] that is one of the [[platinum]] [[metal]]s.  It is the densest of all the natural elements.  Because pure osmium [[oxidize]]s to the extremely toxic osmium tetroxide, osmium is rarely used in its pure form. Osmium also has a very unique ability; it can apparently undergo osmosis. The unique electron structure of the Osmium³⁺ ion allows it to be pulled through a thin membrane to the other side, on the surface apparently similar to water undergoing osmosis. This ability to penetrate easily into the furthest reaches of the human body is what allows it to be so toxic to humans.<ref>Advanced Chemistry 'Chemical Storylines', Salters-Nuffield, 2001</ref>.

   

   

[[Category:Elements]]

[[Category:Elements]]