Question

help of an example.
18. (a) How were the positions of isotopes of an element decided in the modern periodic table ?
(b) How were the positions of cobalt and nickel resolved in the modern periodic table ?
(c) Where should hydrogen be placed in the modern periodic table ? Give reason for your answer.​

Answer 1

Explanation:

a)modern periodic table is arranged in the increasing oder of atomic numbers.

isotopes are atom of same elements having different atomic mass,but the same atomic number.

Isotopes have not been given seprate place in modern periodic table

a)answe