Question

Hey..::》《
Difference between Mendeleev periodic table and Modern Periodic table in five points.
Plz answer:》《✌​

Answer 1

hey mate !

Mendeleev's periodic table Modern periodic table

Mendeleev's periodic table is based on atomic mass

Modern periodic table is based on atomic number

Mendaleev's periodic table contains about 66 elements.

Modern periodic table contains about 112 elements

In Mendeleev's periodic table there were gaps for undiscovered elements.

Modern periodic table maintains uniformity.

In Mendeleev's periodic table noble gases were not placed (as they are not discovered at that time). In Modern periodic table noble gases in a seperate group named as group-18.

In Mendeleev's periodic table transition elements included with other elements In Modern periodic table transition elements placed in separate block.

Answer 2

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Mendeleev periodic table is the basis for the modern periodic table that we use today. It has 65 known elements, but with the newly discovered elements, there are 103 elements in the modern periodic table. The key difference between Mendeleev and Modern periodic table is that the basis of the modern periodic table is mainly the electronic configuration of the elements, which we call as the atomic number whereas Mendeleev periodic table considers the atomic mass of the elements.

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