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Pm

Promethium
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Nuovo indirizzo! - http://www.periodni.com/it/ - Prego aggiornare la lista dei links
Promethium was discovered by J. A. Marinsky, Lawrence Glendenin and Charles D. Coryell (USA) in 1945. Named after Prometheus in Greek mythology, who stole fire from the gods. It is rare earth metal of synthetic origin on the earth, naturally made in stars. Poison. Radiotoxic. Radioactive.
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METALLI DI TRANSIZIONE: LANTANIDI |
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ENERGIE DI IONIZZAZIONE ED ABBONDANZA |
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Isotopo |
Massa atomica relativa |
Abbondanza (%) |
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143Pm | 142.910928(4) | * |
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145Pm | 144.912744(4) | * |
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147Pm | 146.915134(3) | * |
Promethium does not occur naturally. Found among fission products of uranium, thorium and plutonium. It has been used as a source of radioactivity for thickness-measuring gages.
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POTENZIALI DI RIDUZIONE STANDARD |
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Semi-Reazione |
Eo / V |
Annotazione |
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