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Does the existence of isotopes contradict part of Dalton's original of atomic theory?
Yes.
How does the discovery of isotopes contradict Dalton's theory?
It was then changed to "All atoms of the same element contain the same number of protons and electrons, but atoms of a given element may have different numbers of neutrons." after James Chadwick discovered that the nuclei of most atoms contain neutrons as well as protons.
Which is not part of John Dalton atomic theory?
Atoms are made up of smaller particles.
How did Thomson experiment change Dalton's atomic model?
John Dalton stated "all atoms of a given element are identical"; discovery of isotopes by Thomson infirmed this old hypothesis.
How did Thomson experiment change Dalton atomic model?
John Dalton stated "all atoms of a given element are identical"; discovery of isotopes by Thomson infirmed this old hypothesis.
Which event would be impossible to explain by using John Daltons model of the atom?
A Dalton's model of atom doesn't exist. Dalton principles are not in agreement with the discovery of isotopes and nonstoichiometric compounds.
Did the existence of isotopes affect the validity of the atomic theory?
Dalton's theory said that "atoms of the same element are the same as each other in terms of mass, color, and size." We know that this cannot be true because isotopes of the same element, oxygen for example O-16 and O-17, have different mass numbers (atomic mass). Dalton's theory said that "atoms of the same element are the same as each other in terms of mass, color, and size." We know that this cannot be true because isotopes of the same element, oxygen for example O-16 and O-17, have different mass numbers (atomic mass).
What are the problems with Dalton's atomic theory and the formation of a new modern atomic theory?
the isotopes triangle and the pink puffy altoid middle of the gobstopper
Dalton hypothesized that atoms are indivisible and that all atoms of an element are identical. It is now known that?
Because the existence of isotopes was discovered not all atoms of an element are identical.
Which of Dalton's postulates can be disproved today?
Dalton's postulate that atoms are indivisible has been disproved with the discovery of subatomic particles like protons, neutrons, and electrons. Additionally, his postulate that all atoms of the same element are identical has been disproved with the existence of isotopes.
What kind of information might be available to scientists today that would lead them to disagree with Dalton's atomic theory?
1. Discovery of isotopes: not all atoms of the same chemical element are identical. 2. Discovery of the atomic structure: atoms are indivisible by chemical methods but they are divisible with physical methods in components.
What was the inaccurate observation that Dalton made?
John Dalton inaccurately proposed that atoms of the same element are identical in mass and properties. This assumption disregarded the existence of isotopes, which are atoms of the same element that have different masses due to varying numbers of neutrons. Additionally, Dalton's model did not account for the existence of subatomic particles, such as electrons and protons, which further challenged his idea of atomic uniformity.
