![[ATOM]](atom.gif) |
Ruthenium
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Information valid for Ru-101 unless otherwise noted
Basic Information
Symbol: Ru
Atomic Number: 44
Mass: 101.07
Melting Point: 2250.0 C
Boiling Point: 3900.0 C
Number of Protons/Electrons: 44
Number of Neutrons: 57
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 12.2 g/cm3
Color: silvery
Atomic Structure
![[Bohr Model of Ruthenium]](b0044.gif) |
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Number of Energy Levels: 5
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 15
Fifth Energy Level: 1
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Isotopes
| Isotope |
Half Life |
| Ru-96 |
Stable |
| Ru-97 |
2.89 days |
| Ru-98 |
Stable |
| Ru-99 |
Stable |
| Ru-100 |
Stable |
| Ru-101 |
Stable |
| Ru-102 |
Stable |
| Ru-103 |
39.27 days |
| Ru-104 |
Stable |
| Ru-105 |
4.44 hours |
| Ru-106 |
1.02 years |
Facts
Date of Discovery: 1844
Discoverer: Karl Klaus
Name Origin: From the Latin word Ruthenia (Russia)
Uses: platinum alloys
Obtained From: pentlandite, pyroxinite