Question

Difference between mendeleev's periodic table and modern periodic table.

Answer 1

Answer:

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

Hello friend

1.Mendeleev periodic table was based on atomic mass

1. Modern periodic table is based on atomic number .

2. Mendeleev periodic table was not having noble gases group .

2. Modern periodic table is having noble

gases group ( 18 ).

3.Mendeleev's periodic table was having 66 known elements .

3. In modern periodic table it has 118 elements .

Hope helps

mark brainliest