![[ATOM]](atom.gif) |
Lutetium
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Information valid for Lu-175 unless otherwise noted
Basic Information
Symbol: Lu
Atomic Number: 71
Mass: 174.967
Melting Point: 1656.0 C
Boiling Point: 3315.0 C
Number of Protons/Electrons: 71
Number of Neutrons: 104
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 9.85 g/cm3
Color: silvery
Atomic Structure
![[Bohr Model of Lutetium]](b0071.gif) |
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Number of Energy Levels: 6
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 32
Fifth Energy Level: 9
Sixth Energy Level: 2
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Isotopes
| Isotope |
Half Life |
| Lu-172 |
6.7 days |
| Lu-172m |
3.7 minutes |
| Lu-173 |
1.37 years |
| Lu-174 |
3.3 years |
| Lu-174m |
142.0 days |
| Lu-175 |
Stable |
| Lu-176 |
3.6E10 years |
| Lu-177 |
6.68 days |
| Lu-177m |
160.7 days |
Facts
Date of Discovery: 1907
Discoverer: Georges Urbain
Name Origin: From Lutetia (ancient name of Paris)
Uses: No uses known
Obtained From: gadolinite, xenotime