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2 March, 11:06

How do the number of valence electrons an element has change from column to column?

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  1. 2 March, 13:17
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    It increases by one to the right and decreases by one to the left, except transition elements

    (first column always has 1 valence electron)

    column refers to groups, so group 1 has 1 valence electron, group 2 has 2 valence electron and so on
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