Which of the following is not a postulate of Dalton’s atomic theory:

Question

$\begin{array}{1 1} \text{a. All matter is made up of atoms} \\ \text{ b. Atoms are tiny indivisible and indestructive ultimate particles } \\ \text{ c. Atoms combine in small whole number ratios to form compounds } \\ \text{ d. Atoms of different elements can have the same mass} \end{array}$