Question

Compare the approach of mendeleev and modern periodic table

Answer 1

Here is your answer:

In Mendeleev's periodic table the position of hydrogen was not fixed since it has same properties as alkaline and halogen group but in modern periodic table hydrogen was given a different place on the top left corner.

In Mendeleev's periodic table the position of isotopes was also not detected but in modern since the elements were arranged by increasing atomic number the problem of isotopes were not there.

HOPE IT HELPS YOU.

Answer 2

Answer:

• Mendeleev’s Approach for periodic law

Chemical properties and Physical properties of the elements are the periodic functions of the atomic mass of the corresponding elements.

• Modern approach for the periodic law

Chemical properties and Physical properties of the elements are the periodic functions of the atomic numbers of the corresponding elements.