Thomson model atom

Thomson model of an atom:

J. J. Thomson was the first one to proposed model for structure an atom in 1904.
In this model J. J. Thomson said positive charge protons and negative charge electrons are arranged in sphere like plum in a sphere Christmas pudding ,where dry fruits embedded or pudding in it, So it is also called plum pudding model of an atom.

  • J. Thomson in 1904 Proposed that an atom was spherical positive electricity in which were embedded number of electrons Sufficient to neutralize positive charge.
  • It had me well established that atom contains negatively charge particles (electrons) and to maintain electrical neutrality of the atom positive positive charge were also present within the atom.
  • It also compared with water melon, the negative charge electrons Are like seeds Embedded all over the positive charge Sphere, which is compare to  edible parts (or. Red pulp) in the atom.

  • This model of an atom called Thomson model.
  • How ever it could be explained the results of the scattering experiment Carried out by Rutherford model and hence it was rejected.

Drawbacks of Thompson’s Model:

  • The model doesn’t mentioned anything about nucleus of the atom.
  • It was unable to explain the scattering experiment of Rutherford.
  • It doesn’t mentioned stability .

 

Question answer:

1) Why Thomson model also called plum pudding model ?

Answer: In this model J. J. Thomson said positive charge protons and negative charge electrons are  arranged in sphere like plum in a sphere Christmas pudding ,where  dry fruits embedded in it, So that is why is also called plum pudding model of an atom.

2) Explain Thomson’s model of an atom?

Answer: •  J. J. Thomson in 1904 Proposed that an atom was spherical positive electricity in which were embedded number of electrons Sufficient to neutralize positive charge.

  • It had me well established that atom contains negatively charge particles (electrons) and to maintain electrical neutrality of the atom positive positive charge were also present within the atom.
  • It also compared with water melon, the negative charge electrons Are like seeds Embedded all over the positive charge Sphere, which is compare to edible parts (or. Red pulp) in the atom.

3) Write down drawbacks of Thomson’ s model.

Answer: • The model doesn’t mentioned anything about nucleus of the atom.

  • It was unable to explain the scattering experiment of Rutherford .
  • It doesn’t mentioned stability .

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