what are the limitations of dalton's atomic theory - Science - Atoms and Molecules

Question

what are the limitations of dalton's atomic theory?

Karuna Gupta · Accepted Answer

Drawbacks of Dalton's Atomic Theory:
1 The atom is further subdivided into protons, neutrons and
electrons
2 The atoms of same elements are not similar in all respect They
may vary in mass and density These are known as isotopes For
example: chlorine has two isotopes having mass numbers 35 a m u and
37 a m u
3 Atoms of different elements are not different in all respects
Atoms of different elements that have the same atomic mass are
called isobar
4 According to Dalton atoms of different elements combine in
simple whole number ratio to form compounds This is not seen in
complex organic compounds like sugar C12H22O11
5 The theory fails to explain the existence of allotropes