What are the limitations of Dalton's atomic theory?

Limitations of Dalton's atomic theory:
1) It could not make any distinction between an ultimate particle of an element and that of a compound both of which are loosely called atoms, the former known as simple atoms and the latter known as compound atoms.
2. It could not explain Berzelius hypothesis.
3. It could not explain the Gay Lussac’s law of combining volumes.
4. It could not explain as to why the atoms of different elements combine to form compound atoms.
5. It failed to explain the cause of chemical combination.
6. It failed to give the idea of isotopes and isobars.