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    N

    Nitrogen

    Nonmetal

    Atomic Number: 7 • Atomic Mass: 14.0070 u • Period: 2 • Group: 15

    Electron Configuration: 1s² 2s² 2p³
    Phase: Gas
    Electronegativity: 3.04
    Carbon (C)Oxygen (O)
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    History

    Nitrogen has been known since ancient times

    Historical Timeline

    Discovered in 1772 by Daniel Rutherford

    Also independently discovered by Scheele, Cavendish, and Priestley around the same time

    Named by Jean-Antoine Chaptal in 1790

    Liquefied first by Polish chemists in 1883