Question

What led to the failure of Dalton's atomic theory?

Answer 1

Dalton's atomic theory:

1. According to Dalton's atomic theory, each element consists of smallest particles called atoms.
2. Thus, Dalton stated that atoms are indivisible and indestructible.
3. Also, Dalton stated that atom is the smallest particle.

Failure of Dalton's atomic theory:

1. The discovery of subatomic particles, electrons, protons and neutrons inside the atom is the major reason for the failure of Dalton's atomic theory.
2. The discovery of sub-atomic particles suggested that the atoms are divisible.
3. Also, smaller particles than atom were discovered.

Thus, the discovery of sub-atomic particles led to the failure of Dalton's atomic theory.