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20 February, 17:20

How do you calculate the number of valence electrons in an atom?

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  1. 20 February, 20:53
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    To find the valence electrons in an atom, identify what group the element is in. An element in group 1A has 1 valence electron. For example, Li is in group 1A, so that means it has one valence electron. If the element is in group 2A, then it has two valence electrons.
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