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proton

n.
1.a stable particle with positive charge equal to the negative charge of an electron

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    Idiom of the Day

    in times past
    long ago, in previous times
    In times past, many people attended the sports festival in the small town.



    1.
    If you don't sit down, ________ scream.

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    My Account / Test History
    Element
    Element : technetium
    Symbol : tc
    Atomic no. : 43
    Melting Point (deg c) : 2157
    Boiling Point (deg c) : 4265
    Discoverer : perrier and segre (1937)      .. More >>
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