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Who showed that the atom had a nucleus?
This was an idea of Ernest Rutherford (1871-1937) from 1911.
Who was the scientist who showed that alpha particles are helium nuclei?
Ernest Rutherford discovered that alpha particles are helium nuclei during his famous gold foil experiment in 1909. This experiment provided evidence for the existence of a dense, positively charged atomic nucleus.
What aspect of Dalton's theory was not supported by Thomsons findings?
Dalton's theory proposed that atoms are indivisible and have no subatomic particles, which was not supported by Thomson's discovery of the electron. Thomson's findings showed that atoms contain subatomic particles, challenging the notion of indivisible atoms in Dalton's theory.
What did Rutherford picture an atom as?
Rutherford pictured an atom as a small, dense, positively charged nucleus surrounded by orbiting electrons. He proposed this nuclear model based on his gold foil experiment, which showed that most of the atom's mass and positive charge is concentrated in the nucleus.
Which theory of the atom was disproved?
Ernest Rutherford did not disprove Bohr's model. Modern Scientists, such asSchrodingercreated theelectroncloud model because the location of an electron is unknown and only the probability of an electron being somewhere is known. Bohr's model stated that electrons move in orbits around the nucleus, but the electrons would run out of kinetic energy and would then collapse into the nucleus and then the Nuclear Fusion occurs.
What is the difference between the models made by Rutherford and Dalton?
Dalton's atomic model simply stated that all elements were made of tiny atoms, he said nothing about the structure of those atoms. Rutherford proposed that most of the mass of the atom is concentrated in a tiny central nucleus with positive charge.
Who showed that the atom had a nucleus?
This was an idea of Ernest Rutherford (1871-1937) from 1911.
What did Dalton's experiment show?
He showed that you can show the true show when you show it correctly.
Who showed that radioactivity is caused by the breakdown of one atom into another?
Ernest Rutherford
What person's experiments showed that elements combined in definite and constant proportions?
John Dalton
Why was Dalton's contribution different from that of the ancient Greeks Philosophers?
The ancient Greek philosopher Democritus theorized about atoms, and so did Dalton, but Dalton also performed experiments which confirmed the reality of atoms and showed the way for further research.
What subatomic particles did Rutherford discover in 1919?
Rutherford discovered the proton in 1919 during his gold foil experiment. This experiment showed that atoms have a dense, positively charged nucleus at their center. Rutherford's findings revolutionized the understanding of atomic structure.
How did Thomson discovery change Dalton's atomic theory?
Thomson's discovery of the electron showed that there were things smaller than the atom that could be removed from the atom. Therefor the atom was not an "uncuttable" object as Dalton had proposed.
What did Dalton's experiments show?
Dalton's experiments showed that elements combine in definite proportions to form compounds, supporting the idea of atomic theory. He also proposed that atoms of different elements have different masses, and that chemical reactions involve the rearrangement of atoms.
Which model showed the discovery of a positively charged nucleus?
The Rutherford model was the model that showed the discovery of a positively charged nucleus. In this model, proposed by Ernest Rutherford in 1911, he suggested that atoms have a dense, positively charged nucleus at the center, with electrons orbiting around it. This model provided evidence for the nuclear nature of the atom.
Who first showed that water consists of hydrogen and oxygen?
John Dalton in 1803.See the Web Links to the left of this answer for more information.
How did J J Thomson discovery change Dalton's theory?
J.J. Thomson's discovery of the electron showed that atoms were not indivisible as Dalton thought, but were made up of smaller subatomic particles. This led to the development of the plum pudding model of the atom, which replaced Dalton's solid indivisible atom theory.
