Information valid for Hf-178 unless otherwise noted
[ATOM]

Hafnium

 [ATOM]

Basic Information


Symbol: Hf
Atomic Number: 72
Mass: 178.49
Melting Point: 2150
Boiling Point: 5400
Number of Protons/Electrons: 72
Number of Neutrons: 106
Classification: Transition Metal
Crystal Structure: Hexagonal
Density: 13.2
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

Isotopes

Isotope Half Life
Hf-1721.9 years
Hf-1742e+015 years
Hf-17570 days
Hf-176Stable
Hf-177Stable
Hf-178Stable
Hf-179Stable
Hf-180Stable
Hf-182Stable
Hf-182Stable

Facts


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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