20. What prediction did Mendeleev make that came true less than 20 years
later?
He said that...
Chemistry, 03.09.2020 08:01 aangellexith4237
20. What prediction did Mendeleev make that came true less than 20 years
later?
He said that the periodic table would be developed into 18 families.
He predicted the atomic numbers of unknown elements.
He said that three new elements would be discovered.
He predicted that a total of 112 elements would be discovered.
Answers: 1
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