Urdu Meanings, Pronounciation and Synonyms:
atomic number 61
(Pronunciation -تلفظ سنیۓ )
US: 
Slow
Normal
Noun: atomic number 61
| 1. atomic number 61 [ Synonyms: pm, promethium] | |
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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
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