Question

Describe Thomson model of atom​

Answer 1

Answer:

◼ He proposed that the positive charge is spread over a sphere in which the electrons are embedded to make the atom as the whole nuteral.

◼This model is compared with a watermelon in which seeds are embedded or with a cake or pudding in which raisins (dried grapes / kishmish ) are embedded. That is why this model is sometimes called raisen watermelon or watermelon model .

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=>In short :- An atom posses a spherical shape in which the shape in which the positively charge is uniformly distributed. The electrons are embedded into such a manner as to give the most stable electrostatic arrangements. This model was much like raisins in a pudding and is known as THOMSON'S PLUM PUDDING MODEL.

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LIMITATION:−

✔ Though this model was able to explain the overall neutrally of the atom.

✔It could not satisfactorily explain the results of scattering experiments , carried out by RUTHERFORD in 1911 and was rejected.

✔ This model was discarded as it was not consistent with the results of further investigations such as scattering of

α (alpha ) - particles by thin metal foils.

Answer 2

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In 1904, Thomson proposed atomic model where electrons are embedded within spherically distributed, positive charge (so-called "plum pudding" model). Both the positive charge and the mass of the atom would be more or less uniformly distributed over its