Different between mandeleev periodic table and mordwrn periodic table

1.	Different between mandeleev periodic table and mordwrn periodic table
Answer» In Mendel\'s periodic table elements are arrange on the basis of atomic mass where as in modern arrangement is on the basis of atomic number ....In Mendel\'s the position of hydrogen is not justified while in modern hydrogen is given a position as it is on the basis of atomic number..... In Mendel\'s the position of isotopes were not justified but in modern it is justified.....

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