Chemistry, 12.10.2020 19:01 jaimon8729

Look at the two question marks between zinc (Zn) and arsenic (As). At the time, no elements were known with atomic weights between 65.2 and 75. But Mendeleev predicted that two elements must exist with
atomic weights in this range. What led Mendeleev to predict that two undiscovered elements existed in
that range?

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Look at the two question marks between zinc (Zn) and arsenic (As). At the time, no elements were kno...