Question

difference between the arrangement of elements Mandal periodic table and Modern Periodic Table

Answer 1

Mendeleev's periodic table:-

1)It is based on the atomic mass.

2) All elements where not present in his periodic table.

3)position of hydrogen.

4) position of zero group or inert gas was not there.

Modern periodic table:-

1)It is based on atomic number.

2)position of Hydrogen also not fixed

3)position of inert gas or zero group fixed.

4)All the elements are mostly present

Answer 2

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