Question

differentiate between the arrangement of elements in the mendeleev's periodic table and modern periodic table. Please...

Answer 1

in modern periodic table elements are arranged according to their atomic number and provides place for hydrogen while in Mendeleev periodic table elements are arranged to their atomic masses and no place for hydrogen.

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!!!