osmium
Published on Nov 18, 2015
This deck is used for the presentation to introduce osmium.
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PRESENTATION OUTLINE
Joyia
osmium
Photo by GrrlScientist
Platinum
In 17th century platinum was first discovered in Columbia.
Smithson Tennant
'osme' means a smell in Greek
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physical properties
- grey,silvery and hard
- density:22.59 g/cm3
- melting point: 3306K
Photo by GrrlScientist
chemical properties
- atomic number: 76
- atomic mass: 190.23
- oxidation states: -2 to +8
- 34 isotopes and 7 of them are naturally formed
Photo by GrrlScientist
osmium tetroxide
toxic, volatile,water-soluble, yellow pale and corrosive with smell
osmium tetroxide
- can be obtained from osmium dioxide
- OsO2 + O2 → OsO4
- can be obtained by exposing osmium with air
- Os + 2O2 → OsO4
osmium dioxide
black, non-volatile and non-toxic without smell
alloyed with other metals
Osmium is used to add hardness to alloys
fountain pen tips
instrumental pivots
lamp filament
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Photo by live w mcs
