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    Ca

    Calcium

    Alkaline Earth

    Atomic Number: 20 • Atomic Mass: 40.0780 u • Period: 4 • Group: 2

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
    Phase: Solid
    Electronegativity: 1
    Potassium (K)Scandium (Sc)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Overview

    Calcium is the chemical element with the symbol Ca and atomic number 20. It belongs to the Alkaline Earth group and is located in period 4 of the periodic table. It exists as a solid under standard conditions.

    Basic Information

    • Symbol:Ca
    • Atomic Number:20
    • Atomic Mass:40.0780 u
    • Group:2
    • Period:4
    • Category:Alkaline Earth
    • Phase at STP:Solid
    • Electronegativity:1 (Pauling scale)

    Key Facts

    Fun Fact #1

    Most abundant mineral in the human body

    Fun Fact #2

    Essential for bone structure

    Common Uses

    • Construction (cement, concrete)
    • Food additive
    • Dietary supplement