Q. Why Mendeleev was able to boldly predict that there would bee more elements and how was he able to determine their groups?
Further, how he was able to determine the mass of eka aluminium as 68?
Eka aluminium had been replaced by gallium . How did he know that gallium would be more similar to aluminium.. or he prefixed every element of group and gallium replaced eka aluminium as it was
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Because there were no element at that time of that mass and that group so contradicted that in future the elements will come
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Mandaleev proposed that the properties of elements are their periodic function and arranged the elements in the increasing order of their atomic masses and their functions based on the formulas of the oxides and the hydrides of elements his periodic table contained
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