![]() However, Modern Atomic Theory has revealed that atoms of the same element can have different numbers of neutrons, resulting in isotopes. Atomic Identityĭalton's theory stated that atoms of the same element are identical in size, mass, and other properties. The discovery of these particles has provided a deeper understanding of atomic structure and behavior. While this concept still holds true in Modern Atomic Theory, we now know that atoms are further composed of subatomic particles, including protons, neutrons, and electrons. Composition of Matterĭalton's theory proposed that all matter is composed of indivisible atoms. Let's compare the attributes of both theories in more detail: 1. While Dalton's Atomic Theory laid the foundation for our understanding of atoms, Modern Atomic Theory has expanded upon and refined many of its postulates. This theory has been extensively supported by experimental evidence and mathematical models. It takes into account the wave-particle duality of electrons and the probabilistic nature of their positions within an atom. Modern Atomic Theory provides a more detailed and accurate understanding of atomic structure and behavior.
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