Meaning Of The Word Prometheum

Real Dictionary

What's the definition of Prometheum? Find Prometheum meanings, definitions and more at the Real Dictionary online.

Prometheum Meaning

Prometheum Definition
Prometheum Definition

What's The Definition Of Prometheum?

prometheum in British English
noun
noun: a radioactive element of the lanthanide series artificially produced by the fission of uranium. Symbol: Pm; atomic no: 61; half-life of most stable isotope, 145Pm: 17.7 years; valency: 3; melting pt: 1042°C; boiling pt: 2460°C (approx.)

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