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Secondary IV • 1yr.

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.

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    Team Alloprof • 1yr.

    Hello!

    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.


    Don't hesitate to come back and see us if you have any other questions!