Question

write the difference between mendeleev periodic table and modern period table

Answer 1

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Answer 2

Mendeleev's periodic table Modern periodic table  :-

1.Mendeleev's periodic table is based on atomic mass

2. Mendeleev's periodic table contains about 66 elements.

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

4. In Mendeleev's periodic table noble gases were not placed (as they are not discovered at that time.

5.In Mendeleev's periodic table transition elements included with other elements.

Modern periodic table :-

1.Modern periodic table is based on atomic number.

2.Modern periodic table is based on atomic number.

3. Modern periodic table maintains uniformity.

4. In Modern periodic table noble gases in a seperate group named as group-18

5. In Modern periodic table transition elements  placed in separate block.