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Mi historia sobre la quimica

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  1938 Aug 5 Era atómica
  1777 May 4 Epoca Moderna
  1777 May 4 Epoca Moderna
  1700 Sep 5 Iatroquimica
  1700 Jul 11 Flogisto
  450 Aug 8 Perido Griego
  450 Jul 3 Perido Prehistorico
  300 Sep 8 Alquimia
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