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promethium
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nature : Periodic System III ethnic group vice Larthanide. A radioactive rare earth elements. Atomic number 61. Radioisotope : 147 β so. Amu 144.9127. In 1945 artificial obtained. 1080 ° C melting point. The boiling point of about 2,700 ° C The quality of the Saint 147, the half-life of 2.64 years, was often isolated and important isotopes. For tracer atom, the space nuclear batteries.


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1) Promethium
2) promethium
3) promethium Pm
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