How could modern periodic table remove various anomallies of mendeleev periodic table/

Explanation

In modern periodic table elements were placed according to their atomic number, instead of atomic. mass that was used in Mendeleev.s periodic and removes various anomalies, as clear from below:
(i) Isotopes get the position in the periodic table.
(ii) Position of anomalous pairs is fully explained. For example, atomic, number of tellurium is 52 while that of iodine is 53 so putting tellurium before iodine is justified.
(iii) Position of hydrogen is explained.
(iv) Cause of periodicity gets explained.
(v) Noble gases are properly placed in group 18.