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As you move from left to right across the periodic table __. Question options: The atoms become more reactive. The number of electron shells on the atom increase. The atoms decrease in mass. The number
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As you move from left to right across the periodic table __. Question options: The atoms become more reactive. The number of electron shells on the atom increase. The atoms decrease in mass. The number of valence electrons on the atom increase.

User Paul McCabe
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The number of valence electrons on the atom increase.
User Leyou
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