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Iridium at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

Name: Iridium
Symbol: Ir
Atomic Number: 77
Atomic Mass: 192.217 amu
Melting Point: 2410.0 °C (2683.15 K, 4370.0 °F)
Boiling Point: 4527.0 °C (4800.15 K, 8180.6 °F)
Number of Protons/Electrons: 77
Number of Neutrons: 115
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 22.5 g/cm3
Color: white

Atomic Structure

[Bohr Model of Iridium]  
Number of Energy Levels: 6

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 15
    Sixth Energy Level: 2


Isotope Half Life
Ir-1881.7 days
Ir-18913.2 days
Ir-19011.8 days
Ir-190m1.2 hours
Ir-190m23.2 hours
Ir-19273.8 days
Ir-193m10.5 days
Ir-19419.3 hours
Ir-194m170.0 days


Date of Discovery: 1804
Discoverer: S. Tenant
Name Origin: From the Latin word iridis (rainbow)
Uses: tip gold pens, crucible and special containers
Obtained From: gravel deposits with platinum

Related Links

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MLA Format for Citing This Page

Bentor, Yinon. Chemical Element.com - Iridium. <http://www.chemicalelements.com/elements/ir.html>.

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