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=Iridium One Of the Denisit metals on the face of the earth=

Iridium-Symobol Ir it is located in the sixth period and has 2 valence electons
The boiling point for Iridium is 4428 oC, 8002.4 oF, and 4701.15 K while the melting point of Iridium is 2446 oC, 4434.8 oF, and 2719.15 K. The density of Iridium is 22.4g/cm3 and it has 77 Electrons,Protons and 77 electrons and an atomic mass of 192.217 grams Its

Iridium has an electron configuration of [Xe] 4f145d76s2 and was discovered by Smithson Tennant of London in 1803 when he dissolved a small batch of platinum in aqua regia and it left behind the two elements Iridium and Osmium.

It is mined in all part of the world but is most prominently mined in South Africa and can also be produced…. Mostly in south Africa.

It can be found in small batches with gravel deposits, platinum and osmiridium ores

It does not cost vary much as it is ceap to make and refine it is used in pen tips and containes to hold vary hot items two common chemical reactions are Ir(s) + O 2 (g) → IrO 2 (s) -- Ir(s) + 3F 2 (g) → IrF 6 <span style="font-family: 'Helvetica','sans-serif';">(s)


 * **<span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 13px;">Description: **

<span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 13px;">Heavy brittle white transition metal.


 * [|**Conductivity**]**<span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 13px;"> Electrical: **<span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 13px;"> 0.197 10 <span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 8px;">6 <span style="color: black; font-family: 'Verdana','sans-serif'; font-size: 13px;">/cm Ω**Thermal:** 1.47 W/cmK [[image:lvscience/Iridium configuration.gif]] <--- Bohr Model

Fun fact: Iridium is sometimesw used in phonograph needles

Citations

<span style="font-family: 'Verdana','sans-serif'; font-size: 15px;">Kenneth Barbalace. Periodic Table of Elements - Iridium - Ir. EnvironmentalChemistry.com. 1995 - 2013. Accessed on-line: 3/1/2013 <span style="font-family: 'Verdana','sans-serif'; font-size: 15px;">http://EnvironmentalChemistry.com/yogi/periodic/Ir.html

<span style="font-family: 'Verdana','sans-serif'; font-size: 15px;">Rcs [] **Gill Cockhead No stated copy right date**
 * I dont have another one i can do.......**