Question

give any two drawbacki of dalton atomic theroy

Answer 1

Two drawbacks of Dalton's atomic theory are: (1)Dalton said that atoms cannot be broken but after the discovery of proton, electron and neutron, his atomic theory failed. (2)Dalton said that atoms of same element have same mass but after the discovery of isotopes it was found that atoms of same elements can have different mass. (3)Dalton said that atoms of different elements have different mass but after the discovery of isobars it was found that atoms of different elements can have same mass.