what does the period number tell us about an element in the periodic table?

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  • Anonymous
    1 decade ago
    Favourite answer

    How many electrons and protons are in an element and the period number is subtracted with the weight of the element and the result is how many neutrons it has

    Source(s): School teachers
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  • Anonymous
    1 decade ago

    it tells the number of shells an element has

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  • 1 decade ago

    It tells us which row the element is in.

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  • 1 decade ago

    how many protons and electrons are in the element

    Source(s): ermm..the science book?
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  • 1 decade ago

    it tells us which group it is in and its valence electron number

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