Chemistry

Vegyjelek, anyagmennyiség

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  • 1. Multiple-choice
    20 seconds
    1 pt

    Mi a hélium vegyjele

    H

    He

    Hl

  • 2. Multiple-choice
    20 seconds
    1 pt

    Mi az oxigén vegyjele?

    Ox

    O

    X

    Os

  • 3. Multiple-choice
    20 seconds
    1 pt

    Mi a kálium vegyjele?

    Ka

    K

    Ca

    C

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