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

Basic Information

Name: Erbium
Symbol: Er
Atomic Number: 68
Atomic Mass: 167.26 amu
Melting Point: 1522.0 °C (1795.15 K, 2771.6 °F)
Boiling Point: 2510.0 °C (2783.15 K, 4550.0 °F)
Number of Protons/Electrons: 68
Number of Neutrons: 99
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 8.795 g/cm3
Color: grayish

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 30
    Fifth Energy Level: 8
    Sixth Energy Level: 2


Isotope Half Life
Er-1699.4 days
Er-1717.5 hours
Er-1722.1 days


Date of Discovery: 1843
Discoverer: Carl Mosander
Name Origin: Ytterby (a town in Sweden)
Uses: ceramics
Obtained From: heavier rare earth minerals

Related Links

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MLA Format for Citing This Page

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

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