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    Tb

    Terbium

    Lanthanide

    Atomic Number: 65 • Atomic Mass: 158.9300 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁹
    Phase: Solid
    Electronegativity: 1.2
    Gadolinium (Gd)Dysprosium (Dy)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Terbium is the chemical element with the symbol Tb and atomic number 65. It belongs to the Lanthanide group and is located in period 6 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Tb
    • Atomic Number:65
    • Atomic Mass:158.9300 u
    • Group:101
    • Period:6
    • Category:Lanthanide
    • Phase at STP:Solid
    • Electronegativity:1.2 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named after Ytterby, Sweden

    Fun Fact #2

    Used in sonar systems

    Common Uses

    • Fuel cells
    • Green phosphors
    • Magneto-optical storage devices