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How did the gold foil experiment disprove the plum pudding model?
Wiki User
∙ 13y ago
Rutherford an =d two of his assisstants sat up an alpha emitter which is a helium nucleus in a vaccum, when the alpha particles hit the foil sheet some of them went straight, some were reflected and some were deflected (that was not expected to happen).
So Rutherford concluded that an atom is mainly an empty space that is why most of the particles went straight through. Moreover, he said that there is a positive molecule in the middle that is why some particles were reflected, also some were reflected because the positive molecule in the middle is very heavy and fixed strongly in its place.
These conclusions probably will contradict with the theory of the plum pudding model because if stated that the atom is mainly like a positive dough and negative charges are spread out through it.
Wiki User
∙ 13y ago
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Which experiment led to the dispute of the plum pudding model?
The gold foil experiment, because it proved that there were nuclei in the atoms
What wa Rutherford's gold foil experiment?
The gold foil experiment supplanted the plum pudding theory. The gold foil experiment led to the discovery that most of the atoms mass is located in the dense nucleus.
Which model of the atom was supported by the gold foil experiment?
The Rutherford model, or the nuclear model
If the Thomson model of the atom had been correct Rutherford would have observed?
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.
Who invented plum pudding model?
The plum pudding model was first introduced by J.J. Thomson in 1904 in the March edition of the UK's Philosophical Magazine. It was invalidated 5 years after during what is now known as the Rutherford gold foil experiment, an experiment designed to probe the atom.
How do the plum pudding model and Rutherfords model of an atom differ?
The plum pudding model displays the atom as negatively charged electron embedded in a fluid of positive charge, thus the name plum for the electron and the pudding for the positive fluid thought to balance the negative charges. The Rutherford model is based on the gold foil experiment and it has a nucleus in which is extremely small, positively charged and dense. The model has lots of empty space around the nucleus which was where the electrons were placed.
How did Rutherford's alpha scattering experiment show that Thomson's plum pudding model of the atom incorrect?
Rutherfords experiment proved the existence of a nucleus as some alpha particles "bounced back" from the gold foil sample . Thomson model did not involve a nucleus and predicted just a slight deflection or none at all.
How did J.J. Thomson's discovery affect the model of the atom?
J.J. Thomson is credited with the discovery of the electron in about 1904. He envisioned negatively charged "corpuscles" floating in a positively charged cloud, just like plums in a plum pudding. This was the "plum pudding" model of the atom, and it lasted until Geiger and Marsden conducted their gold foil experiment in about 1909.
What did Ernest Rutherford learn from his gold foil experiment?
E. Rutherford developed his atomic model due to the results of his gold foil experiment. His atomic model describes a small central, dense core and a surrounding volume of charged particles.
How did Ernest Rutherford's gold foil experiment change the model of the atom?
After that famous experiment, it was realized that atoms were mostly empty space.
Did Gold foil experiment supported the blueberry muffin model of the atom?
The blueberry muffin model said that the particles of the atom are evenly distributed through a positively charged medium. The gold foil experiment showed that some rays were deflected, indicating a mass capable of deflecting the rays projected through the gold foil, thus disproving the muffin model.
What is Ernest Rutherford's contributions to the atomic sturcture?
Rutherford's famous gold foil experiment disproved Thompson's "plum pudding" model of the atom, and instead suggested a small, central, positively charged region (the nucleus) surrounded by a cloud of negatively charged electrons.
