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10 March, 09:26

What are the first 20 elements and their chemical symbols

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  1. 10 March, 09:29
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    Hydrogen (H)

    Helium (He)

    Lithium (Li)

    Beryllium (Be)

    Boron (B)

    Carbon (C)

    Nitrogen (N)

    Oxygen (O)

    Fluorine (F)

    Neon (Ne)

    Sodium (Na)

    Magnesium (Mg)

    Aluminum (Al)

    Silicon (Si)

    Phosphorus (P)

    Sulfur (S)

    Chlorine (Cl)

    Argon (Ar)

    Postassium (K)

    Calcium (Ca)
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