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| Fermium | Fermium | Fermij | Fermio | Fermium | ||||||||||||||||||||
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Fm Fermium |
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- Fermium was discovered by Albert Ghiorso (USA) in 1953. Named in honour of Enrico Fermi. It is synthetic radioactive metal.
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TRANSITION ELEMENT: ACTINIDE | |
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| Relative atomic mass: | [257] | Electronic configuration: | [Rn] 5f12 7s2 |
| Formal oxidation number: | +3 | Electronegativities: | - |
| Thermal conductivity: | - W m-1 K-1 | Electrical resistivity (20 °C): | - μΩcm |
| Atomic radius: | - pm | Standard state (20 °C): | solid |
| Density (g dm-3): | - | Molar volume (cm3 mol-1): | - |
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THERMAL PROPERTIES | |
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| Melting point: | 1527 °C | Heat of fusion: | - kJ mol-1 |
| Boiling point: | - °C | Heat of vaporization: | - kJ mol-1 |
| Critical temperature: | - °C | Heat of atomization: | 141 kJ mol-1 |
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IONIZATION ENERGIES AND ABUNDANCE | |
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| 1st ionization energy: | 627.16 kJ mol-1 | Abundance of element (air): | - ppm |
| 2nd ionization energy: | - kJ mol-1 | Abundance of element (Earth's crust): | - ppm |
| 3rd ionization energy: | - kJ mol-1 | Abundance of element (oceans): | - ppm |
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ISOTOPES | |
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Isotopes | Relative atomic mass | Abundance (%) |
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MINERALS AND USES | |
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- Fermium was produced by bombarding lighter transuranium elements with still lighter particles or by neutron capture.
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REDUCTION POTENTIALS | |
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Balanced half-reaction | Eo / V | Annotation |
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