Question
Dalton assumed that all atoms of the same element were identical in all their properties. Explain why this assumption is not valid.
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Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons in their nuclei. This difference in the number of neutrons leads to variations in the atomic mass of the isotopes, as well as some differences in their Show more…
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These questions are designed to be considered by groups of students in class. Often these questions work well for introducing a particular topic in class. Dalton assumed that all atoms of the same element are identical in all their properties. Explain why this assumption is not valid.
"Like atoms are identical in all respects". This statement of Dalton's atomic theory is contradicted. What discovery contradicts this?
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