Question

Differentiate between modern periodic table and Mendeleev periodic table in the tabular form ?

Answer 1

modern periodic table £

1)properties of elements are a periodic function of their atomic number

2)there are 7 periods and 18 groups

3)there are 118 elements in modern periodic table

MENDELEEV PERIODIC TABLE

1)the properties of elements are the periodic function of their atomic masses

2)there was only 6 period and 8 groups

3)there was only 63 elements in Mendeleev's periodic table
_____________
HOPE IT HELPS |

Answer 2

Answer:

• Mendeleev's periodic table

1. elements are arranged in increasing order of their atomic masses.
2. It is not divided into any blocks.
3. There are 8 groups.
4. Isotopes could not be placed properly.

• Modern periodic table

1. Elements are arranged in increasing order of their atomic numbers.
2. It is divided into four blocks, namely s-block,p-block,d-block and f-block.
3. There are 18 groups.
4. Isotopes occupy the same position as the element.

Hope you understood mate!!!