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1. The arrangement of the elements from left to right inPeriod 4 on the Periodic Table is based onA) atomic massB) atomic numberC) the number of electron shellsD) the number of oxidation states
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1. The arrangement of the elements from left to right inPeriod 4 on the Periodic Table is based onA) atomic massB) atomic numberC) the number of electron shellsD) the number of oxidation states

User Robert Klemme
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The arrangement of the elements from left to right in Period 4 on the Periodic Table is based on B) atomic number.

User Hwatkins
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