Structure of an Atom: According to Dalton’s atomic theory, atom was indivisible and indestructible. Now, the discovery of two fundamental particles (electrons and protons) inside the atom, led to the failure of this aspect of in Dalton’s theory. To know the arrangement of electrons and protons within an atom, many scientist proposed various atomic models.
Thomson’s Model of an Atom: J.J. Thomson was the first scientist to propose a model for the structure of an atom. Thomson’s model of an atom was similar to Christmas pudding. The electrons in a sphere of positive charge were like currants (dry fruits) in a spherical Christmas pudding. It can also be compared to a watermelon, in which, the positive charge in an atom is spread all over like the red edible part, while the electrons studded in the positively charged sphere, like the seeds in the watermelon. Following are the postulates of this model: Limitations of Thomson’s Model of an Atom: | ![]() |
Electrons are embedded in the sphere of _____________charge. | |||
Right Option : A | |||
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Which of the following are the postulates of Thomson Model : (a) Electrons are embedded in the sphere of the positive charge. (b) Most of the fast moving alpha particles passed straight through the gold foil. (c) The negative and positive particle are equal in magnitude.Therefore, the atom as whole is electrically neutral. | |||
Right Option : D | |||
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J.J. Thomson was the ______________ scientist to propose a model for the structure of an atom. | |||
Right Option : B | |||
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One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
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Abhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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In terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
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Third consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
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Abhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.