Question

Differentiate between the arrangement of elements in mendeleev's periodic tableand modern periodic table.

Answer 1

manly periodic table is based on atomic mass and chemical reactivity where is in modern period table is based on atomic number that is number of protons increasing number of protons

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!!!