Question

define Mendeleev's periodic table with limitation

Answer 1

Limitations of mendeleev’s classification :

(i) He could not assign a correct position of hydrogen in his periodic table, as the properties of hydrogen resembles both with alkali metals as well as with halogens.

(ii) The isotopes of the same element will be given different position if atomic number is taken as basis, which will disturb the symmetry of the periodic table.

(iii) The atomic masses do not increases in a regular manner in going from one elements to the next.

So it was not possible to predict how many elements could be discovered between two elements.

Answer 2

RĀM RĀM JĪ ☺☺✌

ĀñsWēr ⏬⏬⏬⏬

⭕ MENDELEEV 'S PERIODIC TABLE

◽ The physical and chemical properties of the elements are periodic functions of their atomic weight .

⭕ LIMITATIONS ⏬⏬

◽Mendleev could not provide separate places for isotopes.

◽wrong order of atomic masses of some elements could not be explained.

◽A correct position could not be assigned to hydrogen in the periodic table.

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