Chemistry

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Sistemul periodic al elementelor

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  • 1. Multiple-choice
    30 seconds
    1 pt

    Un metal este ...

    clor

    sulf

    fosfor

    calciu

  • 2. Multiple-choice
    30 seconds
    1 pt

    Un gaz rar este

    argon

    argint

    arseniu

    aramă

  • 3. Multiple-choice
    30 seconds
    1 pt

    Simbolul sodiului este ..

    So

    S

    Na

    N

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