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Secondary IV • 2yr.

Does the way the periods are arranged in the periodic table mean anything? thank you


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Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

    Team Alloprof • 2yr.


    The periods of the periodic table indicate the number of electron shells of the elements that are there.

    The elements of the first period, hydrogen (H) and helium (He), have a single electron shell, while the elements of the third period, for example calcium (Ca) and arsenic (As) , have three electron shells.

    The periods are therefore established to classify this number of layers.

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