Question

Which of the following statement (s) about the Modern Periodic Table are incorrect

1. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number
2. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses
3. Isotopes are placed in adjoining group (s) in the Periodic Table
4. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number

Options

• (i) only

• (i), (ii) and (iii)

• (i), (ii) and (iv)

• (iv) only

Answer 1

(i), (ii) and (iii)

Explanation - 

The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number and not on the basis of their increasing atomic masses. Also, the Isotopes are not placed in the adjoining group (s) in the Periodic Table.