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    Lu

    Lutetium

    Lanthanide

    Atomic Number: 71 • Atomic Mass: 174.9700 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹
    Phase: Solid
    Electronegativity: 1.27
    Ytterbium (Yb)Hafnium (Hf)
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    History

    Lutetium has been known since ancient times

    Historical Timeline

    Independently discovered by Carl Auer von Welsbach

    Isolated from ytterbia