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OpenStudy (cookie_2046):
What did scientists discover when they arranged elements in order of increasing atomic mass? A. a repeating pattern of properties B. a puzzling series of numbers C. alphabetical arrangement of the names of elements D. no patterns or relationships
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OpenStudy (cookie_2046):
@CODblackops2 do u know this one?
OpenStudy (anonymous):
A
OpenStudy (cookie_2046):
Thxs u
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