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Before we state the results of the Rutherford gold foil experiment based on the correctness of the Thomson plum pudding model, let's back up and review just a bit.
Atoms were thought to be made up of electrons distributed in a positive "matrix" of sorts. With the electrons "evenly distributed" throughout the volume of the atom, a parallel or comparison was made to plum pudding. The plums, which were "scattered" throughout the pudding, were thought of as the electrons in the atom. This is the basis for the plum pudding model of the atom.
The gold foil experiment that Rutherford proposed was set up, and alpha particles were "fired" at gold foil from an alpha source (alpha emitter). As the alpha particles were known to be massive compared to an electron, an experiment on atoms conforming to the plum pudding model of the atom would show that the alpha particles zip right through. There would be nothing anywhere near as massive as an alpha particle in the plum pudding atom to stop or scatter them. All the alpha particles would strike the target screen behind the foil in a direct line from the source.
When the experiment was actually conducted, most of the alpha particles struck as expected. But a few were scattered in different directions, and this was "impossible" if the atom was constructed as suggested by the plum pudding model. What internal structure in the plum pudding atom could possibly deflect (scatter) a few (or any!) alpha particles? The plum pudding model was set aside, and Rutherford's suggestion was that most of the mass of the atom was concentrated as a positive charge in the center in what we call a nucleus.
What else can I help you with?
What main feature of Thomson atomic model was charged after Rutherford discoveries?
The main feature of Thomson's atomic model that was changed after Rutherford's discoveries was the location of the positive charge in the atom. Rutherford discovered that the positive charge was concentrated in a small nucleus at the center of the atom, rather than being spread out evenly throughout the atom as Thomson had proposed.
What is the difference between Thomsons atomic model and Rutherfords atomic model?
Thomson's model was the "Plum Pudding model" because it had electrons "floating" around in the ball, but Rutherford's model shows the electron shells, the nucleus, and the molecular particles: neutron, proton, and electron. Hope this helps!
What scientific inquiry skill was Rutherford using in selecting Thomson's model for investigation?
Rutherford was using the scientific inquiry skill of hypothesis testing when selecting Thomson's model for investigation. He proposed an alternative model to test and refine the existing understanding of the structure of the atom, setting up experiments to gather evidence that would support or refute Thomson's model.
What did Rutherford discover that Thomson did not understand?
That most of an atom's mass was packed in a central nucleus
Why did Rutherford change Thomson's model of the atoms?
According to his Thompson's model, an atom was a sphere of positive matter that held electrons, so Rutherford discovered that an atom has a nucleus and that the nucleus contains most of the matter of the atom. Also that the atom has electrons, protons, and neutrons surrounding it.
Was neils bohr jj Thomson's student?
No, Niels Bohr was not J.J. Thomson's student. Niels Bohr was a student of Ernest Rutherford, who was a colleague of J.J. Thomson. Bohr developed his own atomic model, known as the Bohr model, which built upon the work of Thomson and Rutherford.
What was the Ernest Rutherford's experiment?
Rutherford, Geiger and Marsden observed that a beam of alpha particles is deflected on a gold foil. They concluded that this effect is due to a positive entity in the atom. And they discovered the atomic nucleus, separate from electrons and the model of Thomson become obsolete.
What did ernest Rutherford?
Ernest Rutherford is perhaps best known for his model of the atom. He developed his own model, based upon his research, to replace Thomson's plum-pudding model.
What value did Rutherford's model of an atom have over Thomson's model?
Thomson said that charges are distriduted evenly in entitre atom. but Rutherford said that charges(electrons) are continuously revolving around the nucleus,a small region where the entire mass of atom is subjected to be. Thomson failed to put forward the concept of nucleus and orbitals.
What main feature of Thomson atomic model was charged after Rutherford discoveries?
The main feature of Thomson's atomic model that was changed after Rutherford's discoveries was the location of the positive charge in the atom. Rutherford discovered that the positive charge was concentrated in a small nucleus at the center of the atom, rather than being spread out evenly throughout the atom as Thomson had proposed.
How is Thomson's model based on the experiment of passing alpha particles through the gold foil?
The results of this experiment led to the model of the atom called "Rutherford's model", rather than Thomson's model, which it basically disproved. Some of the alpha particles were deflected in ways that suggested to Rutherford that most of the atom's mass was concentrated in a positively charged "nucleus".
When did Ernest Rutherford propose the plum pudding model of the atom?
The ''plum pudding atomic model" is from J. J. Thomson, year 1904.
What is the difference between Thomsons atomic model and Rutherfords atomic model?
Thomson's model was the "Plum Pudding model" because it had electrons "floating" around in the ball, but Rutherford's model shows the electron shells, the nucleus, and the molecular particles: neutron, proton, and electron. Hope this helps!
What did ernest Rutherford and jj Thomson do together?
Ernest Rutherford and J.J. Thomson worked together on research related to the structure of the atom. Thomson discovered the electron and proposed the plum pudding model of the atom, while Rutherford conducted the famous gold foil experiment that led to the discovery of the atomic nucleus. Their work laid the foundation for modern atomic theory.
What scientific inquiry skill was Rutherford using in selecting Thomson's model for investigation?
Rutherford was using the scientific inquiry skill of hypothesis testing when selecting Thomson's model for investigation. He proposed an alternative model to test and refine the existing understanding of the structure of the atom, setting up experiments to gather evidence that would support or refute Thomson's model.
What did Rutherford discover that Thomson did not understand?
That most of an atom's mass was packed in a central nucleus
How was rutherfords model similar to thomsons model and how was it different?
Rutherford's model was similar to Thomson's model in that both described atoms as having a positively charged center (nucleus) surrounded by negatively charged electrons. However, Rutherford's model differed in that he proposed that the majority of an atom's mass and positive charge was concentrated in the nucleus, with electrons orbiting around it, while Thomson's model suggested that the positive charge was uniformly distributed throughout the atom.
