Different between mendleev\'s table and modern table

1.	Different between mendleev\'s table and modern table
Answer» Mandleev \'s table was based on the atomic mass but modern periodic table a based on atomic number .2. Mandleev \'s contain 6periods and 8groups but modern periodic table contain 7 periods and 18groups3. Transition elements have been placed at the end of mandleev \'s periodic table but in modern periodic table they are placed in the middle

Discussion