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    Ir

    Iridium

    Transition Metal

    Atomic Number: 77 • Atomic Mass: 192.2200 u • Period: 6 • Group: 9

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁷
    Phase: Solid
    Electronegativity: 2.2
    Osmium (Os)Platinum (Pt)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Iridium is the chemical element with the symbol Ir and atomic number 77. It belongs to the Transition Metal group and is located in period 6 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Ir
    • Atomic Number:77
    • Atomic Mass:192.2200 u
    • Group:9
    • Period:6
    • Category:Transition Metal
    • Phase at STP:Solid
    • Electronegativity:2.2 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named after rainbow goddess Iris

    Fun Fact #2

    Most corrosion-resistant metal

    Common Uses

    • Spark plugs
    • Pen tips
    • Crucibles