Osmium

Biola Fatusin

Discovery

It was discovered in 1803 in England, by Smithson Tennant. Smithson Tennant was studying platinum. He dissolved a sample of crude platinum in aqua regia, a mixture of hydrochloric acid and nitric acid, which produced a metallic, black powder. Everybody else just thought it was graphite by the thought he actually tested it the substance and figured out that it was osmium.

Properties

Physical Properties:
  • Atomic Mass: 190.23
  • Atomic Radius in picometers (pm): 185 pm
  • Density: 22.57 grams per cubic centimeter
  • Melting Point: 3033 °C (5491°F)
  • Boiling Point: 5012°C (9054°F)
  • At room temperature (22°C), this element is a: Solid
  • Appearance: Brittle, bluish white
  • Conductivity: 12.3 x 106 S m-1 It’s a conductor
  • Malleability: Not malleable
  • Hardness: moderatley hard
  • Other physical properties: Osmium is unworkable as a metal. It cannot be melted and shaped like most metals.
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Chemical Properties:


  • Flammability: Osmium not flammable
  • Reactivity: Osmium not highly reactive

Location on Periodic Table

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Atomic Structure

Osmium has a mass number of about 190. The atomic number of Osmium is 76 which is also the amount of electrons and protons. It has 114 neutrons.
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Application and Uses

Osmium is mostly used making high quality pen nibs. It’s added to platinum or indium to make them harder as an alloy. Also, its used for needles and electrical contacts. It is also used in the chemical industry as a catalyst.

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Isotopes

Osmium isotopes are used for the production of radioisotopes and scientific experiments. Osmium has seven naturally occurring isotopes. Os-192 can be used for the production of the medical radioisotope Pt-195m. Os-184 is used for the production of the radioisotope Os-185. Os-191 can be used for the production of the radioisotopes Os-192. Os-190 has been used as a tracer to determine Os abundance in meteorites using isotope dilution ICP-MS. Finally, Os-189 has been used to experiment with nuclear excitation by electronic transition.
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Compounds

It’s used with platinum to make it harder as an alloy. Osmium tetroxide (OsO 4) is in demand for use as a catalyst for research purposes. The problem is that this compound of osmium is very dangerous to use.

Interesting Facts

Osmium is the densest of all metals. The name come from the Greek word osme which means odor.
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Works Cited

- Element Card: Gray, Theodore W. (2008). The Photographic Card Deck of the Elements.

- Elements Book: Gray, Theodore W. (2009). The Elements: A visual exploration of every known atom in the universe. New York: Black Dog & Leventhal Publishers, Inc.

- Website: http://www.rsc.org/periodic-table © Royal Society of Chemistry 2015

- Website: http://periodic.lanl.gov/index.shtml © Copyright 2016 LANS, LLC All rights reserved

Image: http://www.chm.bris.ac.uk/motm/oso4/oso4.jpg

Image:http://www.rsc.org/chemistryworld/sites/default/files/upload/1g_Osmiumtetroxid_300tb.jpg

Image:http://www.knowledgedoor.com/2/elements_handbook/osmium_components/navigator_periodic_table.png

Image:http://i3.cpcache.com/product/1544852199/76_osmium_tile_coaster.jpg?height=225&width=225

Image: http://www.nature.com/nchem/journal/v4/n11/images/nchem.1479-i1.jpg

- https://upload.wikimedia.org/wikipedia/commons/0/0c/Osmium_crystals.jpg