Back to Elements
    Rg

    Roentgenium

    Transition Metal

    Atomic Number: 111 • Atomic Mass: 282.0000 u • Period: 7 • Group: 11

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d⁹
    Phase: Solid
    Electronegativity: 1.9
    Darmstadtium (Ds)Copernicium (Cn)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Roentgenium is the chemical element with the symbol Rg and atomic number 111. It belongs to the Transition Metal group and is located in period 7 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Rg
    • Atomic Number:111
    • Atomic Mass:282.0000 u
    • Group:11
    • Period:7
    • Category:Transition Metal
    • Phase at STP:Solid
    • Electronegativity:1.9 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named after Wilhelm Röntgen

    Fun Fact #2

    Has a half-life of just seconds

    Common Uses

    • Scientific research
    • Nuclear physics
    • Theoretical chemistry