atomic number 61

(Pronunciation -تلفظ سنیۓ ) US:

Slow

Normal

Noun: atomic number 61

1. atomic number 61 [ Synonyms: pm, promethium]
A soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium

Generic Words:

metal, metallic element

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