What part of Dalton's model was disproved?

Dalton's model of the atom proposed that atoms are indivisible and indestructible particles. However, this was disproved with the discovery of subatomic particles, such as electrons, protons, and neutrons, which showed that atoms can be divided into smaller constituents. Additionally, the existence of isotopes demonstrated that atoms of the same element can have different masses due to varying numbers of neutrons, contradicting Dalton's assertion that all atoms of a given element are identical.