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    Lr

    Lawrencium

    Actinide

    Atomic Number: 103 • Atomic Mass: 266.0000 u • Period: 7 • Group: 103

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 7p¹
    Phase: Solid
    Electronegativity: 1.3
    Nobelium (No)Rutherfordium (Rf)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Lawrencium is the chemical element with the symbol Lr and atomic number 103. It belongs to the Actinide group and is located in period 7 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Lr
    • Atomic Number:103
    • Atomic Mass:266.0000 u
    • Group:103
    • Period:7
    • Category:Actinide
    • Phase at STP:Solid
    • Electronegativity:1.3 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named after Ernest Lawrence

    Fun Fact #2

    Last element in actinide series

    Common Uses

    • Scientific research
    • Nuclear physics
    • Chemical properties studies