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What J J Thomson was famous for?
he was a British scientists that discovered negatively charged particles, electrons, inside the atom. he proposed a possible structure of the atom (atomic model) called the plum pudding. you can google some images
What flaws exist in Thomson's plum pudding model of the atom?
The plum pudding model of the atom was not correct. The prediction that alpha particles would pass through a sample of matter and would be deflected only minimally was disproved by rutherford and co-workers who found that some alpha particles (1 in 8000) bounced almost straight back. This was explained by the presence of a nucleus. Other phenomena were also difficult to explain. For example atomic absorption spectra with the sharp, principal and diffuse lines.
What is a plum pudding?
In the U.K. plum pudding is also called Christmas pudding since it is served with Christmas dinner. Believe it or not, it contains NO PLUMS! Plums used to be the term used for raisins. The pudding has a lot of dried fruit in it held together by egg and suet and sometimes moistened by molasses and flavored with cinnamon, nutmeg, cloves, ginger and other spices. The pudding is aged for a month or longer -- that's because they drench it in alcohol. My grandma used to say it was too drunk to spoil. She would wrap it well, put it in the pantry and leave it there for an entire year, or until she got the hankering for some "pud".
How did ernest Rutherford interpret the gold foil experiment?
Rutherford discovered that atoms are mostly empty space except for the nucleus at the center of the atom.
How did the results of JJ Thomson's experiments change how scientists thought about atoms?
He described the atom as a sea of positive charge sprinkled with electrons
What evidence better support the solid sphere model or the plum pudding model?
The Bohr model is accepted today - of course, with some refinements.
How did the gold foil experiment disprove the plum pudding model?
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.
Rutherford's experiment included bombarding thin gold foil with alpha particles based on this research he concluded that?
The then current Plum Pudding theory of the atom was wrong: protons and electrons were not evenly distributed and free in the atom, instead the protons carrying the positive charge must be concentrated in a very small volume at the center of the atom that he named the nucleus with the electrons orbiting some distance away.
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.
What is plum pudding?
In the U.K. plum pudding is also called Christmas pudding since it is served with Christmas dinner. Believe it or not, it contains NO PLUMS! Plums used to be the term used for raisins. The pudding has a lot of dried fruit in it held together by egg and suet and sometimes moistened by molasses and flavored with cinnamon, nutmeg, cloves, ginger and other spices. The pudding is aged for a month or longer -- that's because they drench it in alcohol. My grandma used to say it was too drunk to spoil. She would wrap it well, put it in the pantry and leave it there for an entire year, or until she got the hankering for some "pud".
How did the result of gold foil experiment lead Rutherford to recognize the existence of atomic nuclei?
By beaming alpha particles through gold foil and witnessing some of them deflecting, there had to be a mass larger than an alpha particle in the atomic structure. This disproved the plum pudding theory of the atom, as electrons would not have had enough mass to deflect the larger alpha particles.
What are some foods that have an English origin?
fish and chips, roastbeef, spotted dick, plum duff , Yorkshire, pudding, scones, Yorkshire Sauce, crumble, Welsh Rarebit, porridge, flapjacks .....
