Question

Differentiate between mendellevs periodic table and morden periodic table

Answer 1

Mendeleff periodic Table is arranged by atomic weight and modern periodic table is arranged by atomic number

Answer 2

Mendeleevs periodic table ::-

Mendeleevs period law states that - The properties of the elements are the periodic function of their atomic masses.

1.) The elements were arranged according to their increasing atomic masses

2.) There was no place for isotopes

3.) Some elements like Cobalt and Nickel were not arranged in their increasing atomic masses.

4.) It was not followed but it gave many ideas to other scientists to form the proper periodic table

Modern periodic table ::-

Modern periodic law states that ::- The properties of the elements are the periodic function of their atomic no.s.

1.) The elements were arranged according to their increasing atomic no.s

2.) There was place for isotopes as the elements were arranged in atomic no.s

3.) Though elements like Cobalt and Nickel were not in its increasing atomic masses, the elements were arranged according to their atomic no.s.

4.) It was universally accepted and is followed till today.

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