Difference between mendeleev periodic table and modern periodic table

1.	Difference between mendeleev periodic table and modern periodic table
Answer» It is not important for exm<br>Mendeleev periodic table is not complete table because he can not explain the position of hydrogen and not full fill the all gap in periodic table. But modern periodic table is a table who gives the scientist NEILS BOHR . Now we used the atomic no. Of periodic table . Ok.<br>Somebody plz tell me where it is necessary or not<br>Not necessary from examination point of view

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