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How does the periodic table help to determine the number of valence electrons for an element? ​

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Answer:

valence electrons are determine by the numbers at the top of the grop so group 1 has 1 valence electron, group 2 has 2 valence electrons, groups 3-12 have no valence electrons, group 13 has 3 valence electrons, group 14 has 4 valence electrons, group 15 has 5 valence electrons, group 16 has 6 valence electrons, group 17 has 7 valence electrons and group 18 has 8 valence electrons exept helium. helium has 2 valence electrons.

Step-by-step explanation:

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