Question

How is Mendeleev s periodi table different from modern periodic table?

Answer 1

Mendeleev's periodic table is based upon mass number and the modern periodic table is based upon an element's atomic number

Answer 2

Mandeleeves Periodic Table..
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1 ) Elements are arranged In increasing order of atomic masses..

2 ) There was no position fixed of. Isotopes....

3 ) Position of hydrogen was not justified because it resembles both with alkali metals and Halogens........

4 ) Lactinoides and actinoides are not having there Unique positions............

Modern Periodic table...
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1 ) Elements are arranged in increasing order of atomic number..

2 ) Isotopes have their unique position....

3 ) Hydrogen has given a unique position due to its resemblence with Alkali metals and Halogens......

4 ) Lactinoides and Actinoides had given a unique position........

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