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 jan 1864 ano – 23 h 59 m, 31 dez 1864 ano)
Adicionado na linha do tempo:
Data:
1 jan 1864 ano
23 h 59 m, 31 dez 1864 ano
~ 12 months