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    Na

    Sodium

    Alkali Metal

    Atomic Number: 11 • Atomic Mass: 22.9900 u • Period: 3 • Group: 1

    Electron Configuration: 1s² 2s² 2p⁶ 3s¹
    Phase: Solid
    Electronegativity: 0.93
    Neon (Ne)Magnesium (Mg)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Sodium is the chemical element with the symbol Na and atomic number 11. It belongs to the Alkali Metal group and is located in period 3 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Na
    • Atomic Number:11
    • Atomic Mass:22.9900 u
    • Group:1
    • Period:3
    • Category:Alkali Metal
    • Phase at STP:Solid
    • Electronegativity:0.93 (Pauling scale)

    Key Facts

    Fun Fact #1

    Reacts violently with water

    Fun Fact #2

    Essential for nerve function

    Common Uses

    • Table salt
    • Street lamps
    • Nuclear reactors