Iridium

By Cameron and Tucker

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Information

- Discovered by a British chemist Smithson Tennant as well as osmium

in the residue left when crude platinum is dissolved by aqua regia in 1803.

USES: bonded with other metals to form stronger metal alloys, spark plugs, and certain ink pins, and satellites.

Iridium is a brittle, hard lustrous, dense transition metal and is part of the Platinum family. It is unaffected by air, water and even acids.

-When bonding with other elements, it can have diferent numbers of valence electrons.

Periodic Table Information

  • Atomic number: 77

  • Atomic mass: 192

  • Protons and electrons: 77

  • Neutrons: 115

  • Symbol: Ir

  • 9th period

  • Group 6
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Model

Model

Valence Electrons: 2

Lewis Dot : Ir:

Group

Transition metal

  • They form colored compounds.

  • They are good conductors of heat and electricity.

  • They can be hammered or bent into shape easily.

  • They are less reactive than alkali metals such as sodium.

  • They have high melting points

  • They are usually hard and tough

  • They have high densities

Reaction Type

-Ir(s) + O2(g) → IrO2(s)

Ir(iii)+Cl-> IrCl3

Ir(iii)+Br->IrBr3

Ir(iii)+I-> IrI3

Ir+S-> IrS2

Ir+Se->IrSe2

Bonding

-IrO2

-Iridium dioxide

-Ionic compound

-Ionic

Vesper Shape: Linear

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Stoichiometry

-Balanced equation:-Ir(s) + O2(g) → IrO2(s)

-.4786 moles Ir

Specific Heat


-Boiling point: 4400 k

-Specific heat :.0133 j/gk

-Melting point: 2680 k
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Citations

"Water Treatment Solutions." Iridium (Ir). N.p., n.d. Web. 13 Dec. 2015.

BBC News. BBC, n.d. Web. 13 Dec. 2015.

Staff, By Live Science. "Facts About Iridium." LiveScience. TechMedia Network, 23 Aug. 2013. Web. 13 Dec. 2015.

N.p., n.d. Web.

"Iridium - Element Information, Properties and Uses | Periodic Table." Iridium - Element Information, Properties and Uses | Periodic Table. N.p., n.d. Web. 13 Dec. 2015.

"Google." Google. N.p., n.d. Web. 13 Dec. 2015.

"The Element Iridium." It's Elemental -. N.p., n.d. Web. 13 Dec. 2015.

"Chemical Elements.com - Iridium (Ir)." Chemical Elements.com - Iridium (Ir). N.p., n.d. Web. 13 Dec. 2015.

"Chemical Elements.com - Iridium (Ir)." Chemical Elements.com - Iridium (Ir). N.p., n.d. Web. 13 Dec. 2015."Chemical Elements.com - Iridium (Ir)." Chemical Elements.com - Iridium (Ir). N.p., n.d. Web. 13 Dec. 2015.

"Iridium: The Essentials." Iridium»the Essentials [WebElements Periodic Table]. N.p., n.d. Web. 13 Dec. 2015.