29
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en
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
614914
187809
2

This doesn't work for six elements, however. These being: iron, manganese, nickel, cobalt, zinc and copper (jan 1, 1817 – 23h 59min, dec 31, 1817 y)

Added to timeline:

28 Nov 2018
0
0
216
Key Scientists in the construction of the periodic timetable
Chemistry homework for the 30/11/18 detailing the title

Date:

jan 1, 1817
23h 59min, dec 31, 1817 y
~ 12 months
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