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atomic number 61. How to pronounce the english word atomic number 61.Start with S. Learn from me.



atomic number 61
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  • n. 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

    同义词： promethium Pm

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    英英释义

    atomic number 61

    n.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

    同义词：promethiumPm




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