What is the difference between the Atomic Theory and the Kinetic Theory?

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Atomic theory is about structure of an atom, i.e., its composition. Like an atom in general is made up of number of protons, neutrons residing in nucleus and electrons orbiting around the nucleus. However, kinetic theory deals with the manifestations of gases as molecules assuming that the volume occupied by molecules is negligible compared to the domain and the intermolecular force between molecules is also insignificant. Also assuming that there is a perfectly elastic collision between molecules and between molecules and wall, various macroscopic properties like pressure, temperature, enthalpy etc are derived. For example pressure exerted by gas on chamber walls can be derived by computing the momentum exchange of molecules with the wall. Thus apparently there is no similarity between the two above-mentioned theories.
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