Question

Differentiate between the arrangements of elements in mendeleev period table and modern periodic table

Answer 1

in Mendeleev the elements are arrange d in order of their increasing atomic weight but in modern periodic table there are arrange d in order of their increasing atomic number.

Answer 2

The main difference between mendeleev periodic table and modern periodic table is

Mendeleev taken atomic numbers as primary function for periodic table. But Moseley ( modern periodic table) said electronic configurations of elements as primary function. We are following the modern periodic table at present.