According to Dalton's atomic theory, what are atoms?

According to Dalton's atomic theory, atoms are defined as indivisible and indestructible particles. This core idea laid the foundational principle that matter is composed of small, discrete units called atoms, which cannot be created or destroyed in a chemical reaction. Dalton proposed that these atoms combine in specific ratios to form compounds, and since they are indivisible, they retain their identity during chemical changes. This concept was revolutionary at the time and provided a scientific basis for understanding chemical reactions.

The notion that atoms are visible and easily separable is inconsistent with atomic theory, as atoms are not visible to the naked eye and require sophisticated instruments to observe indirectly. The idea that atoms are only found in certain materials contradicts the understanding that all matter is made up of atoms. Additionally, the claim that all atoms are equal in size and mass is inaccurate as different elements have distinct atomic sizes and masses due to their unique compositions. Thus, recognizing atoms as indivisible and indestructible particles aligns perfectly with the foundational principles established by Dalton's work.