Question

discuss the achievements of modern periodic table

Answer 1

Modern periodic table takes care of the three limitation of Mendeleev periodic table.
Elements when arranged in the order of their increasing atomic number lead us to a classification called modern periodic table. Prediction of the elements could be made with more precision when elements are arranged in the order of their atomic number. when atomic number was taken as the basis for classification, the problem of isotopes could be easily met.
The prediction of hydrogen could be made when imaged in group 1 and group 17 of modern periodic table.

Answer 2

Answer:

modern periodic table place the isotopes in increasing order.

it tells the place of hydrogen.

it place the element according to atomic number.