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Thomson’s Atomic Model

Background of Thomson’s Atomic Model

Q1: What is Thomson’s Atomic Model?

Answer:

Thomson’s Atomic Model was the first model to explain the basic structure of the atom. It was given by famous scientist JJ Thomson after the discovery of electrons from his cathode ray experiment. He claimed that atoms are made up of electrons and protons and the electrons are embedded in the continuous spread of protons as the pulm is spread in the pudding. Hence this model is also called the Pulm-Pudding model, according to him atom is electrically neutral and the magnitude of positive and negative charges are equal.

Q2: Which Model best explains Atom’s Neutrality?

Answer:

Thomson’s Atomic Model was the one which first explains that as a whole an atom is an electrically neutral entity. He states that the magnitude of the negative charge (electrons) and the magnitude of the positive charge (protons) are equal in an atom.

Q3: What are the major Drawbacks of Thomson’s Model?

Answer:

Various drawbacks of Thomson’s Atomic Model are,

  • It fails to explain the existence of the neutrons that were discovered by Chadwick.
  • It fails to explain the finding of Rutherfor’s Gold Foil experiment.
  • It does not explain the existence of isoelectric species, etc.

Q4: What are the Important Features of Thomson Atomic Model?

Answer:

The important features of the Thomson Atomic model are,

  • It was the first model to think that atom is like a sphere.
  • It successfully explains the neutrality of the atom.
  • It explains that the magnitude of positive and negative charges in an atom is equal.

Thomson’s Atomic Model

Thomson’s Atomic Model is one of the fundamental models of the atom that tries to explain the working and structure of the atom. this model was proposed by famous Scientist JJ Thomson in 1904. Thomson during his cathode ray experiment proved the existence of a negatively charged particle called electron that exists inside the atom. And after complaining about his result he prosed the Thomson atomic model also called Pulm Pudding Model. 

In this article, we will learn more about, Thomson Atomic Model, its postulate, and its limitations in detail. 

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Thomson’s Atomic Model

Thomson’s Atomic Model was proposed by J.J. Thomson in 1904, following his discovery of the electron in 1897 after his famous cathode ray experiment. The model is also known as the Plum Pudding Model. In this model, Thomson proposed that atoms are composed of a positively charged sphere with negatively charged electrons embedded within it. The positive charge of the sphere was thought to be uniformly distributed to balance out the negative charge of the electrons. The electrons were held in place by electrostatic attraction to the positive sphere....

Observations of Thomson’s Atomic Model

Thomson’s Atomic Model, also called the Plum Pudding Model states that an atom can be compared to a plum pudding where electrons are like dry fruits in a sphere of positive charge, representing the pudding. We can also compare this with a watermelon where the positive charge is comparable to the edible part of the watermelon, and electrons are like seeds that are embedded in that sphere....

Postulates of Thomson’s Atomic Model

Various Postulates of Thomson’s Atomic Model are mentioned below:...

Limitations of Thomson’s Atomic Model

Thomson’s atomic model had several limitations that were eventually overcome by further research and the experiments of various scientists later on. Some of the limitations of Thomson’s Atomic Model are:...

Background of Thomson’s Atomic Model

The first scientific discussion about the structure of atoms was started by famous scientist JJ Thompsom in 1897. He stated that atoms are spherical shape objects in which electrons are embedded in a jelly-like substance and the jelly-like substance is called protons. Initially, scientists are of the view that atoms are indivisible and they did not believe the explanation of Thomson stating that atoms are made up of smaller particles. This was proved later by his cathode ray experiment which proved that atoms are made up of negatively charged particles called Electrons....

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Background of Thomson’s Atomic Model