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    Sc

    Scandium

    Transition Metal

    Atomic Number: 21 • Atomic Mass: 44.9560 u • Period: 4 • Group: 3

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
    Phase: Solid
    Electronegativity: 1.36
    Calcium (Ca)Titanium (Ti)
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    Occurrence

    Scandium is found in various natural sources, including minerals, rocks, and the Earth's crust.

    • Relatively rare on Earth but more common in the Sun and certain stars
    • Never found as a free element in nature
    • Widely dispersed in trace amounts in over 800 mineral species
    • Main sources include thortveitite and rare earth minerals
    • Estimated abundance in Earth's crust is about 22 ppm