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

Basic Information

Name: Hafnium
Symbol: Hf
Atomic Number: 72
Atomic Mass: 178.49 amu
Melting Point: 2150.0 °C (2423.15 K, 3902.0 °F)
Boiling Point: 5400.0 °C (5673.15 K, 9752.0 °F)
Number of Protons/Electrons: 72
Number of Neutrons: 106
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 13.2 g/cm3
Color: Silver

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 10
    Sixth Energy Level: 2


Isotope Half Life
Hf-1721.9 years
Hf-1742.0E15 years
Hf-17570.0 days


Date of Discovery: 1923
Discoverer: Dirk Coster
Name Origin: From the Latin word Hafnia (Copenhagen)
Uses: nuclear reactors
Obtained From: zircon

Related Links

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MLA Format for Citing This Page

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

For more information about citing online sources, please visit the MLA's Website.

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