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

Basic Information

Name: Osmium
Symbol: Os
Atomic Number: 76
Atomic Mass: 190.23 amu
Melting Point: 3045.0 °C (3318.15 K, 5513.0 °F)
Boiling Point: 5027.0 °C (5300.15 K, 9080.6 °F)
Number of Protons/Electrons: 76
Number of Neutrons: 114
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 22.4 g/cm3
Color: silvery

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 14
    Sixth Energy Level: 2


Isotope Half Life
Os-18593.6 days
Os-1862.0E15 years
Os-190m9.9 minutes
Os-19115.4 days
Os-191m13.1 hours
Os-19330.5 hours
Os-1946.0 years


Date of Discovery: 1803
Discoverer: Smithson Tenant
Name Origin: From the Greek word osmŽ (odor)
Uses: tip gold pen points, instrument pivots, electrical light filaments
Obtained From: ores that contain platinum

Related Links

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MLA Format for Citing This Page

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

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