Osmium (Os)

Osmium
osmium
Symbol Os
Atomic Number 76
Atomic Mass 190.2 g.mol -1
Discovered by Smithson Tennant in 1803

Chemical Properties of Osmium

Group 8 Melting point 3045 °C
Period 6 Boiling point 5027 °C
Block d Density (g cm−3) 22.5872
Atomic number 76 Relative atomic mass 190.23
State at 20°C Solid Key isotopes 192Os
Electron configuration [Xe]4f14 5d6s2 CAS number 7440-04-2
ChemSpider ID 22379 ChemSpider is a free chemical structure database

What is Osmium?

  • Osmium is a lustrous and silvery metal with an atomic number of 76 in the periodic table.
  • It tends to be a dense metal. It appears like a bluish metal that occurs in the group Platinum.

Uses of Osmium

  • It is employed in industries as a catalyst.
  • It also has a great use in the field of space applications because of its high reflectivity.
  • It is used in light bulbs and incandescent lamps to increase the light output.
  • Osmium tetroxide is being used in fingerprint detection.
  • It is used as an electrolyte in the battery applications as it can absorb hydrogen atoms.
  • It is used in fountain pen tips.

Properties of Osmium

  • The metal is neither affected by acid or by water but tends to dissolve in molten alkalis.
  • It is a naturally occurring element and it can also be obtained by commercial means during the refining of nickel.
  • At high temperatures, the metal turns lustrous, hard and brittle.

Certain Facts About Osmium

  • Osmium was first discovered in the year 1803 by William Hyde Wollaston and Smithson Tennant in England.
  • Osmiridium and iridosmine are the ores of osmium and this metal is rarely found in some parts of North America, South America, and also in Russia.

Practise This Question

On hydrolysis with dil H2SO4, starch and cellulose give 'X' and 'Y'. Then 'X' and 'Y' are a pair of