Promethium 145 has a half life of 17.7 years.
Promethium 146 has a half life of 5.53 years.
Promethium 147 has a half life of o.22 years.
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The half-life of promethium-145 is approximately 17.7 years. Promethium-147 has a half-life of about 2.62 years.
Promethium salts, oxides, and halides are common compounds of promethium. Promethium oxide (Pm2O3) and promethium chloride (PmCl3) are among the compounds that can be formed with promethium.
Promethium can be melted and boiled.
It is impossible, promethium is highly radioactive.
The chemical symbol of promethium is Pr.
Promethium does not occur naturally on earth, but as a by-product of uranium fission. It is very radioactive and its salts have a pinkish or reddish color. Promethium colors its surrounding air with a pale blue-green light.