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13 September, 15:16

The number of valence electrons in an atom can often be quickly determined by referencing A. the atomic mass of the element. B. the period number on the periodic table. C. the atomic number of the element. D. the group number on the periodic table.

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  1. 13 September, 15:23
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    The number of valence electrons in an atom can often be quickly determined by referencing: the group number on the periodic table.
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