Information valid for Ho-165 unless otherwise noted
[ATOM]

Holmium

 [ATOM]

Basic Information


Symbol: Ho
Atomic Number: 67
Mass: 164.93
Melting Point: 1470
Boiling Point: 2720
Number of Protons/Electrons: 67
Number of Neutrons: 98
Classification: Rare Earth
Crystal Structure: Hexagonal
Density: 8.54
Color: Silver

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 29
    Fifth Energy Level: 8
    Sixth Energy Level: 2

Isotopes

Isotope Half Life
Ho-1223.6 minutes
Ho-12313.2 hours
Ho-1244.2 days
Ho-12560.1 days
Ho-12613 days
Ho-127Stable
Ho-12825 minutes
Ho-1291.57e+007 years
Ho-13012.4 hours
Ho-1318 days
Ho-1322.3 hours
Ho-13320.8 hours
Ho-13452.6 minutes
Ho-1356.6 hours
Ho-1361.4 minutes
Ho-1634570 years
Ho-165Stable
Ho-1661.1 days
Ho-166m1200 years

Facts


Date of Discovery: 1878
Discoverer: J.L. Soret
Name Origin: Form the Latin word Holmia (Stockholm)
Uses: nuclear reactors
Obtained From: gadolinite

Related Links

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