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OpenStudy (clamin):
PLEASE HELP!! MEDAL & fan!! When did all this scientists discovered the theory of the atoms and the importance of their discovery. -Empedocles -John Dalton -J.J. Thomson -Niels Bohr
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OpenStudy (anonymous):
440 B.C.- Empedocles 1803 A.D.- John Dalton 1897 A.D.- J.J. Thomson 1922 A.D.- Niels Bohr
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