What were the demerits in dobereiner's periodic table?newlands and mendeleev
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Answer:
limitations or anomalies of dobereiner is:-
the limitation of dobereiner triads was that it failed to arrange all a known element in the form of traids of elements having similar chemical properties of dobereiner could identify 388 form elements known at that time so his classification of an element was not much successful.
limitation of Newland Octave law:- .
Newlands classification of an element based on his law of Octave. which does not give the exact same writing between elements so this could not explain the all properties of elements and this is why we need and importance another classification of elements.
limitation of for anomalies of Mendeleev periodic table :-
●the position of isotopes could not be explained by Mendeleev periodic table .
● tongue order of atomic masses of some elements could not be explained.
● a correct position could not assig to hydrogen in the periodic table of Mendeleev.
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