![[ATOM]](atom.gif) |
Osmium
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Information valid for Os-190 unless otherwise noted
Basic Information
Symbol: Os
Atomic Number: 76
Mass: 190.23
Melting Point: 3045.0 C
Boiling Point: 5027.0 C
Number of Protons/Electrons: 76
Number of Neutrons: 114
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 22.4 g/cm3
Color: black
Atomic Structure
![[Bohr Model of Osmium]](b0076.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: 14
Sixth Energy Level: 2
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Isotopes
| Isotope |
Half Life |
| Os-184 |
Stable |
| Os-185 |
93.6 days |
| Os-186 |
2.0E15 years |
| Os-187 |
Stable |
| Os-188 |
Stable |
| Os-189 |
Stable |
| Os-190 |
Stable |
| Os-190m |
9.9 minutes |
| Os-191 |
15.4 days |
| Os-191m |
13.1 hours |
| Os-192 |
Stable |
| Os-193 |
30.5 hours |
| Os-194 |
6.0 years |
Facts
Date of Discovery: 1804
Discoverer: Smithson Tenant
Name Origin: From the Greek word osmë (odor)
Uses: tip gold pen points, instrument pivots, electrical light filaments
Obtained From: ores that contain platinum