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mendeleev

n.
1.Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)

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  • Idiom of the Day

    sit on one's hands
    to do nothing, to fail to help
    The manager sat on her hands and refused to do anything about the complaints that she had received.



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    My Account / Test History

    Element
    Element : potassium
    Symbol : k
    Atomic no. : 19
    Melting Point (deg c) : 63.5
    Boiling Point (deg c) : 759
    Discoverer : davy (1807)      .. More >>
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