Back to Elements
    Eu

    Europium

    Lanthanide

    Atomic Number: 63 • Atomic Mass: 151.9600 u • Period: 6 • Group: 101

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁷
    Phase: Solid
    Electronegativity: 1.2
    Samarium (Sm)Gadolinium (Gd)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Europium is the chemical element with the symbol Eu and atomic number 63. 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:Eu
    • Atomic Number:63
    • Atomic Mass:151.9600 u
    • Group:101
    • Period:6
    • Category:Lanthanide
    • Phase at STP:Solid
    • Electronegativity:1.2 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named after Europe

    Fun Fact #2

    Most reactive rare earth element

    Common Uses

    • Red and blue phosphors for screens
    • Anti-counterfeiting in Euro banknotes
    • Nuclear reactors