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Lawrencium - Lr General Information Discovery Lawrencium was discovered by A. Ghiorso and co-workers in 1961 in California, USA. Appearance Lawrencium is a radioactive metal. Only a few atoms have ever been made, so its appearance is unknown. Source Lawrencium is produced by bombarding californium with boron nuclei. Uses Lawrencium has no uses outside research. Biological Role Lawrencium has no known biological role. It is toxic due to its radioactivity. |
| Physical Information | |||
| Atomic Number | 103 | ||
| Relative Atomic Mass (12C=12.000) | 260 (radioactive) | ||
| Melting Point/K | not available | ||
| Boiling Point/K | not available | ||
| Density/kg m-3 | not available | ||
| Ground State Electron Configuration | [Rn]5f146d17s2 | ||
| Electron Affinity(M-M-)/kJ mol-1 | not available |
| Key Isotopes | ||||||
| nuclide | 260Lr | |||||
| atomic mass | ||||||
| natural abundance | 0% | |||||
| half-life | 3 mins |
| Other Information | ||
| Enthalpy of Fusion/kJ mol-1 | n/a | |
| Enthalpy of Vaporisation/kJ mol-1 | n/a | |
| Oxidation States | ||
| Lr+3 | ||
| Ionisation Energies/kJ mol-1 | ||
| M - M+ | not applicable | |
| M+ - M2+ | ||
| M2+ - M3+ | ||
| M3+ - M4+ | ||
| M4+ - M5+ | ||
| M5+ - M6+ | ||
| M6+ - M7+ | ||
| M7+ - M8+ | ||
| M8+ - M9+ | ||
| M9+ - M10+ | ||
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