This was very accurate and precise and, in places where there were exceptions, allowed for him to predict where new elements would be placed and their relative atomic mass, to a great degree of accuracy (1 Jan 1869 Jahr – 23 St. 59 Min, 31 Dez 1869 Jahr)
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Datum:
1 Jan 1869 Jahr
23 St. 59 Min, 31 Dez 1869 Jahr
~ 12 months