Which of the following statement is correct in regard to the classification of elements ?

Options

A. Elements in modern periodic table are arranged on the basis of increasing atomic masses
B. Element in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers
C. In modern periodic table the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass
D. In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group

Answer

D

Explanation

NA