Question

for the modern periodic table.
Evaluate Yourself
1. What is the basic difference in approach between Mendeleev's periodic table
and modern periodic table ?​

Answer 1

Answer:

Answer : Mendeleev periodic Law states that the physical and chemical properties of the elements are a periodic function of their atomic weights while Modern periodic law states that physical and chemical properties of elements are a periodic function of their numbers

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's are 18 groups.
4. Isotopes occupy the same position as the element.

Hope you understood mate!!!