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  1. #1
      Eiman
    Jul 2011
    -
    14,750





    : Ar He , Kr , Ne , Rn , Xe , ( ) Uuo

    ɡ ɡ

    ,

    - 1962 - , 1 %




    1868, .





    1868 . (Janssen ) ( Frankland ) ( Lockyer ) Helios




    1894 ( Ramsay)





    ( Cleveite ) ( Kayser ) 1895

    ,

    , , 0.0005 % . ,

    2 %





    1898 ( Ramsay) ( Travers )




    (Neos) ,

    ( 0.0018 % ) , .





    1892




    1894

    0.93 % ,


    1.6%





    1898


    , 0.0001 %





    1898 .


    ( 0.0000087 % ) , , 0.08





    1900 (Fredrich Ernst Dorn)

    . .



    ҡ ɡ .


    Ununoctium



    1999 116, 118 ( )

    , . 2002, . (IUPAC)




    .

    , ( 0.3 0.5 ) , , CO2 ( MEA ) , , -156 , , 75 % 25 %

    , , -193 , .
    -268.9 -252

    , , , , , , , , , 99.999 %

    ( Pb )






    .......

  2. #2

    Jan 2013
    6,984

    :



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