 Periodic Table 
| Osmium | Symbol | Os | | Atomic Number | 76 | Relative Atomic Mass 12C = 12.0000 | 190.23 | | Atomic Radius pm | 135 | First Ionisation Energy kJ mol-1 | 840 | | Electronegativity | 2.2 | Density kg m -3 | 22590 [293 K] 20100 [l., m.p.] | | Molar Volume cm3 | 8.43 | Thermal Conductivity W m -1 K -1 | 87.6 [300 K] | | Melting Point K | 3327 | | Boiling Point K | 5300 | | Number of Isotopes | 37 | | Inner/outer Shells | | | Inner/outer Orbitals | | | Filling Orbital | | Ground State Electron Configuration | | | | Ground State Electron Conf iguration with free Orbitals (n=10) |  | | | Ground State Electron Configuration with compressed Orbitals (n=96) |  | | | | Singularity | | | | | | s | p | d | f | g | h | i | j | 1 | 2 | | | | | | | | 2 | 2 | 6 | | | | | | | 3 | 2 | 6 | 10 | | | | | | 4 | 2 | 6 | 10 | 14 | | | | | 5 | 2 | 6 | 6 | 4 | 14 | 18 | | | | 6 | 2 | 6 | 10 | 14 | 18 | 22 | | | 7 | | | | | | | | | 8 | | | | | | | | |
| | | | Term Symbol | 5 D 4 | | Discovery | Discovered by S. Tennant (London, England) in 1803 | | Name Derived From | Greek osme meaning 'smell' |
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