Which of the following postulates of Dalton's atomic theory has been modified in light of later discoveries?
A)All matter is made up of very small particles called atoms.
B)All atoms of an element are identical.
C)Chemical reactions involve rearrangement of atoms.
D)Compounds are formed from atoms.

Question

Quizplus · Accepted Answer

Dalton's postulate that all atoms of an element are identical has been modified in light of later discoveries. It is now known that some elements have isotopes, which are atoms of the same element with different numbers of neutrons. Therefore, not all atoms of an element are identical.

Which of the Following Postulates of Dalton's Atomic Theory Has