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    K

    Potassium

    Alkali Metal

    Atomic Number: 19 • Atomic Mass: 39.0980 u • Period: 4 • Group: 1

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
    Phase: Solid
    Electronegativity: 0.82
    Argon (Ar)Calcium (Ca)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Potassium is the chemical element with the symbol K and atomic number 19. It belongs to the Alkali Metal group and is located in period 4 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:K
    • Atomic Number:19
    • Atomic Mass:39.0980 u
    • Group:1
    • Period:4
    • Category:Alkali Metal
    • Phase at STP:Solid
    • Electronegativity:0.82 (Pauling scale)

    Key Facts

    Fun Fact #1

    Essential for plant growth

    Fun Fact #2

    Reacts violently with water

    Common Uses

    • Fertilizers
    • Soaps
    • Food additives