Question

Mendeleev's contributions to the concept of periodic table laid the foundation for the Modern periodic Table.Give reasons.

Answer 1

Mendeleev periodic law was physical and chemical properties of elements are a periodic function of their atomic masses he group 2 elements to generalize a study of the elements then known to a study of merit group care gapps for an discovered elements and also predicted the properties of an discovered elements he also corrected the incorrect atomic mass

Answer 2

hey ...

so, here is the solution

(1) *grouping of elements*. he generalized the study of the elements then known to the study of Mere eight groups.


(2) * gapps for undiscovered elements*. in order to make sure that elements having similar properties fell in the same vertical column or group, Mendeleev left some gaps in his periodic table the steps for left for subsequent inclusion of elements known at that time mendeleev correctly thought that such element would be discovered later


(3) * prediction of properties of undiscovered elements*. he predicted the properties of the then unknown elements on the basis of the properties of elements lying adjacent to the vacant slots. actually predicted the properties of some undiscovered element in 1871.



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