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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.
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∙ 13y ago
Wiki User
∙ 9y agoDalton first believed that all atoms of the same kind had the exact same mass. After the discovery of isotopes however, it was proved that not all atoms had the same mass. The modern periodic table of elements reflects this by showing the average number of atoms per isotope.
Wiki User
∙ 10y agoOne of the tenets of Dalton's atomic theory was that atoms of an element are all identical to each other. However, isotopes are "versions" of an element that have different numbers of neutrons, so this clearly doesn't fit into his theory. Of course, when he proposed this theory, he didn't know about isotopes yet.
Wiki User
∙ 14y agoAll atoms of the same element have the same mass
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∙ 10y agoAtoms may not be changed into other atoms.
Wiki User
∙ 13y agoi dont thiink so but it might be true !!
Wiki User
∙ 11y agoIndeed, it did.
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What discovery contradict components of Daltons atomic theory?
These ideas are:· "All atoms of a given element are identical" : discovery of isotopes.· "A given compound always has the same relative numbers of types of atoms" : discovery of nonstoichiometric compounds.
How can an stm help improve daltons theory?
How can an STM help prove Daltons theory
How did the discovery of radioactivity contradict Dalton's atomic theory?
radioactivity proves that there are smaller particles in an atom that makes it up, they are proton, neutron, and electron. Dalton's atomic theory clearly states that the atom is the simplest particle. Radioactivity contradicts Dalton's theory since it proves that there are particles which are simpler than the atom.
Did daltons atomic theory include the idea that all atoms of all elements are the same size?
no.
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 discovery contradict components of Daltons atomic theory?
These ideas are:· "All atoms of a given element are identical" : discovery of isotopes.· "A given compound always has the same relative numbers of types of atoms" : discovery of nonstoichiometric compounds.
What part of daltons theory was modified after discovery of isotopes?
Atoms may not be changed into other atoms.
Does the existence of isotopes contradict part of Dalton's original of atomic theory?
Yes.
What part of daltons theory was modified after the discovery of isotope?
Atoms may not be changed into other atoms.
How can an stm help improve daltons theory?
How can an STM help prove Daltons theory
How did the discovery of radioactivity contradict Dalton's atomic theory?
radioactivity proves that there are smaller particles in an atom that makes it up, they are proton, neutron, and electron. Dalton's atomic theory clearly states that the atom is the simplest particle. Radioactivity contradicts Dalton's theory since it proves that there are particles which are simpler than the atom.
A sentence with the word contradict?
1.I had no evidence to contradict the theory.2.I didn't have any evidence that i could use to contradict the theory.
How did subatomic particles and isotopes affect the atomic theory?
The discovery of these left his atomic theory (which states that atoms are indivisible, singular and the same respectively to elements) riddled with wholes.
How does Daltons atomic theory explain the law of definite proportions?
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Is Charles Darwin contradict the theory of evolution?
No.
Why scientists accepted daltons atomic theory but not the idea of an atom proposed by the Greek philosopher?
the Greek Philosophers did not test their theory.
When was The Discovery of Grounded Theory created?
The Discovery of Grounded Theory was created in 1967.
