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atomic number 87

n.
1.a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

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  • Idiom of the Day

    create a stink
    to make a big issue out of something
    The woman tried to create a stink when she found the bad product at the supermarket.



    1.
    fulmination

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    Invention
    Invention : periodic table
    Year : 1871
    Inventor : dmitry ivanovich mendeleyev
    Country : russia.      .. More >>
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