Information valid for Er-167 unless otherwise noted
[ATOM]

Erbium

 [ATOM]

Basic Information


Symbol: Er
Atomic Number: 68
Mass: 167.26
Melting Point: 1522
Boiling Point: 2510
Number of Protons/Electrons: 68
Number of Neutrons: 99
Classification: Rare Earth
Crystal Structure: Hexagonal
Density: 8.795
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

Isotopes

Isotope Half Life
Er-162Stable
Er-164Stable
Er-166Stable
Er-167Stable
Er-168Stable
Er-1699.4 days
Er-170Stable
Er-1717.5 hours
Er-1722.1 days

Facts


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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