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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
Scientists discovered a repeating pattern of properties when they arranged elements in order of increasing atomic mass.
Expert answered|wisbest|Points 1710|
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Asked 1/16/2013 2:43:05 PM
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