Conductivity experiments showed that some substances allowed the flow of electricity while others did not, indicating variations in atomic composition and structure.
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Observations of how different materials interacted with static electricity suggested that atoms were not indivisible, as some substances conducted electricity while others did not.
Experiments involving static electricity and conductivity of different substances provided early indications that atoms might have internal structure.
John Dalton proposed the idea of atoms being indivisible in the early 19th century as part of his atomic theory.
No, atoms are not indivisible. Sub-atomic particles, such as protons, neutrons, and electrons, exist within atoms, as discovered through experiments.