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Mention three limitations of doberiner trains ? |
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Answer» 1.Traits applecable up to few element2.position of hydrogen not define3.no position for new discover element Nikita u r telling about mendeleev\'s classification.. He could discover only 3 such triads...is the only drawback given in ncert....but still if you want more then you can add that only 30 elements where present at that time.... All known elements could not be classified into traids... He could identify only three traids... 1.position of hydrogen cannot be explained2.wrong place of order of cobalt,nickle3.could not explain the position of isotopes |
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