There are many exceptions to this rule, however, including iron being put in the same group as sulfur and oxygen - explaining why it was disregarded by other scientists (1 ene 1864 año – 23 h 59 m, 31 dic 1864 año)
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fecha:
1 ene 1864 año
23 h 59 m, 31 dic 1864 año
~ 12 months