Back to Elements
    Hf

    Hafnium

    Transition Metal

    Atomic Number: 72 • Atomic Mass: 178.4900 u • Period: 6 • Group: 4

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d²
    Phase: Solid
    Electronegativity: 1.3
    Lutetium (Lu)Tantalum (Ta)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Hafnium is the chemical element with the symbol Hf and atomic number 72. 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:Hf
    • Atomic Number:72
    • Atomic Mass:178.4900 u
    • Group:4
    • Period:6
    • Category:Transition Metal
    • Phase at STP:Solid
    • Electronegativity:1.3 (Pauling scale)

    Key Facts

    Fun Fact #1

    Named after Hafnia, Latin for Copenhagen

    Fun Fact #2

    Very resistant to corrosion

    Common Uses

    • Nuclear reactors
    • Plasma cutting tips
    • Superalloys