Describe Thomson’s plum puddingmodel of the atom
Question
Describe Thomson’s plum puddingmodel of the atom
Solution
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The Plum Pudding Model was proposed by J.J. Thomson in the late 19th century. After discovering the electron in 1897, Thomson proposed this model to describe the structure of an atom.
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According to the Plum Pudding Model, an atom is a large, positively charged sphere.
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Embedded within this positively charged sphere are negatively charged electrons. These electrons are scattered throughout the atom, much like plums in a plum pudding or raisins in a raisin bun, hence the name of the model.
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The positive charge of the atom is evenly spread out to balance the negative charge of the electrons. This means that the overall charge of the atom is neutral.
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This model was widely accepted until the early 20th century. However, it was later disproved by the gold foil experiment conducted by Ernest Rutherford. This experiment showed that the positive charge and most of the mass of the atom is concentrated in a small area in the center of the atom, which is now known as the nucleus. This led to the development of the Rutherford atomic model.
Similar Questions
Who described the atom as being like plum pudding?A.Robert MillikanB.Niels BohrC.J. J. ThomsonD.Ernest RutherfordSUBMITarrow_backPREVIOUS
The plum pudding model hypothesized by Thomson shows the scattering of electrons. When was this discovered in relation to other scientist's atomic hypotheses? After Rutherford but before Chadwick Before Bohr but after Chadwick Before Bohr and Rutherford After Rutherford but before Bohr
What was Thomson's model of the atom called?A.The oil-drop modelB.The photoelectric modelC.The atomic theory modelD.The plum-pudding model
Who proved the plum pudding model wrong?
Which of the following occurred most recently?The development of the atomic model (which says that all matter is made of tiny, indivisible spheres)The development of the Rutherford modelThe development of the plum pudding modelThe development of the Bohr model2Which of the following statements best describes the plum pudding model?The atom is made up of a ball of positive charge with electrons dotted around inside itThe atom is made up of a ball of negative charge with protons dotted around inside itThe atom is made up of a ball of protons, neutrons and electrons which are spread evenly throughout itThe atom contains positive charge in its centre which electrons orbit around3The Rutherford model is based on the results of the Geiger-Marsden experiment. In this experiment, alpha particles were directed at a piece of gold foil. An alpha particle is the same thing as the nucleus of which element?HydrogenCarbonHeliumArgon4Which of the following statements about the Rutherford scattering (Geiger-Marsden) experiment is incorrect?A small number of alpha particles were deflected by small anglesThe experiment was conducted in airMost alpha particles went straight through the gold foilA tiny number of alpha particles (about 1 in 10,000) were deflected by angles of more than 90°5Which of the following is NOT stated by the Rutherford model?Electrons can only orbit the nucleus at specific distancesThe atom is mostly empty space and most of its mass is located in its centre (in the nucleus)Electrons orbit the nucleusThe nucleus and the alpha particle have the same type of charge (positive)6Which of the following statements about the Bohr model is incorrect?An electron can gain energy by absorbing electromagnetic radiationElectrons can only orbit the nucleus at specific distancesWhen an electron loses energy, electromagnetic radiation is emittedThe further away an electron is from the nucleus, the less energy it has
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