• Definition for "atomic number 87"
    • a radioactive part of the alkali-metal team discovered…
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  • Hypernym for "atomic number 87"

atomic number 87 definition

  • noun:
    • a radioactive part of the alkali-metal team discovered as a disintegration product of actinium
    • a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
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