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4 votes
The periodic table is based on an element's

A. atomic mass.
B. atomic number.
C. molecular mass.
D. molecular size.

1 Answer

2 votes
Well, TECHNICALLY, the periodic table is "based" upon a whole myriad of characteristics. But if you're talking about the consecutive arrangement of elements...it would be B, the atomic number.
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User Scott Hyndman
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