Newland's octave theory was, based on atomic weight while Julius Lothar Meyer's classification was based on valence of elements. is, the Mendeleev's periodic table based on atomic weight or valence.

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Solution

Mendeleev's periodic table:-
In this table there is actually the arrangement of all the 63 elements.
This law basically states that the properties of all the elements are the periodic function of their relative atomic masses.
The elements, having the similar chemical properties will not have the same valences in corresponding to their hydrides as well as the oxides.
Therefore, Mendeleev’s periodic table is actually an arrangement of the elements on increasing atomic weights and and not the valences.

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