// todo need optimize like in event.jsp. Add indexing or not indexing this page. 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 (jan 1, 1864 – 23h 59min, dec 31, 1864 y) (Timeline)
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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 (jan 1, 1864 – 23h 59min, dec 31, 1864 y)

Added to timeline:

Key Scientists in the construction of the periodic timetable

ByJamie
28 Nov 2018

Date:

jan 1, 1864
23h 59min, dec 31, 1864 y
~ 12 months
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