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Dalton's atomic theory proposed that atoms are indivisible and indestructible, which is no longer accurate as we now know that atoms can be split into subatomic particles (protons, neutrons, and electrons). Additionally, Dalton's theory stated that all atoms of a given element are identical in mass and properties, but we have discovered isotopes—atoms of the same element with different masses due to varying numbers of neutrons. Lastly, Dalton did not account for the existence of charged particles and the complexities of electron behavior as described by quantum mechanics.

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1mo ago

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What statement from daltons theory no longer true?

One statement from Dalton's atomic theory that is no longer considered true is that atoms of a given element are identical in mass and properties. We now know that atoms of the same element can have different masses due to the existence of isotopes, which are atoms with the same number of protons but different numbers of neutrons. Additionally, advancements in quantum mechanics and the understanding of atomic structure have revealed that atomic properties can vary significantly, challenging the idea of uniformity among atoms of the same element.


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