Promethium

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Promethium is a synthetic chemical element, having the chemical symbol Pm.

Promethium
(145)



  Pm
61
[ ? ] Lanthanide:
Hazard:
Radioactive


Its atomic number (the number of protons) is 61. It has a Standard Atomic Weight of (147), and is typically found as a solid in its elemental form. Promethium has a boiling point of 1,042 °C , and a melting point of 1,042 °C .

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