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

Basic Information

Name: Platinum
Symbol: Pt
Atomic Number: 78
Atomic Mass: 195.078 amu
Melting Point: 1772.0 °C (2045.15 K, 3221.6 °F)
Boiling Point: 3827.0 °C (4100.15 K, 6920.6 °F)
Number of Protons/Electrons: 78
Number of Neutrons: 117
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 21.45 g/cm3
Color: silverish

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 17
    Sixth Energy Level: 1


Isotope Half Life
Pt-18810.2 days
Pt-1906.0E11 years
Pt-1912.96 days
Pt-19360.0 years
Pt-193m4.33 days
Pt-195m4.02 days
Pt-19718.3 hours
Pt-197m1.59 hours


Date of Discovery: 1735
Discoverer: Julius Scaliger
Name Origin: From the Spanish word platina (little silver)
Uses: jewelry, containers, catalyst
Obtained From: platinum ores

Related Links

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