State drawbacks of Dalton’s atomic theory of matter.
Some of the drawbacks of Dalton’s atomic theory of matter are:
1. According to Dalton’s atomic theory, matter is indivisible, i.e., which cannot be divided. But now it is known that under special circumstances, atoms can be divided into still smaller particles called electrons, protons and neutrons.
2. Dalton’s atomic theory fails to explain why substances like charcoal, graphite and diamond have different properties when all these substances are made up of the same type of atoms, called carbon atoms.
3. Dalton’s atomic theory postulated that all the atoms of the same element have exactly the same mass. It is now known that isotopes are atoms of the same element but have different masses.
4. It is now known that some atoms called isobars have same masses but these belong to different elements. Whereas Dalton’s atomic theory says that atoms of different atoms have different mass.
