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For a quiz, ! : ) how did early chemists determine which substances were elements? a. they knew what substances were mixtures. b. they knew how many protons were in the atoms. c. they knew which substances could not be broken down by chemical means. d. they knew how many electrons were in the outer shell of every atom
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For a quiz, ! : ) how did early chemists determine which substances were elements? a. they knew w...
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