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Mendelevium - Md General Information Discovery Mendelevium was discovered by A. Ghiorso and co-workers in 1955 in California, USA. Appearance Mendelevium is a radioactive metal. Only a few atoms have ever been made so its appearance is unknown. Source Mendelevium is made by bombarding einsteinium with alpha-particles. Uses Mendelevium is used only for research. Biological Role Mendelevium has no known biological role. It is toxic due to its radioactivity. |
| Physical Information | |||
| Atomic Number | 101 | ||
| Relative Atomic Mass (12C=12.000) | not available | ||
| Melting Point/K | not available | ||
| Boiling Point/K | not available | ||
| Density/kg m-3 | not available | ||
| Ground State Electron Configuration | [Rn]5f137s2 | ||
| Electron Affinity(M-M-)/kJ mol-1 | not available |
| Key Isotopes | ||||||
| nuclide | 258Md | |||||
| atomic mass | ||||||
| natural abundance | 0% | |||||
| half-life | 54 days |
| Other Information | ||
| Enthalpy of Fusion/kJ mol-1 | n/a | |
| Enthalpy of Vaporisation/kJ mol-1 | n/a | |
| Oxidation States | ||
| main | Md+3 | |
| others | Md+2 | |
| Ionisation Energies/kJ mol-1 | ||
| M - M+ | 635 | |
| M+ - M2+ | ||
| M2+ - M3+ | ||
| M3+ - M4+ | ||
| M4+ - M5+ | ||
| M5+ - M6+ | ||
| M6+ - M7+ | ||
| M7+ - M8+ | ||
| M8+ - M9+ | ||
| M9+ - M10+ | ||
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