We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Thomson’s “Plum Pudding” Model

The whole doc is available only for registered users

A limited time offer! Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed

Order Now

Evaluate a type of model used in science and its uses and limitations. A model is a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original. Scientists use models to present patterns they observe in the world. Models may be actual physical constructions of mental images; they can also be mathematical models, for example the model of a structure of an atom or graphing a wave. There are many uses and limitations of using models in science. The Plum Pudding Model is an atom model proposed by J.J Thomson, the physicist who discovered the electron. In Thomson’s “Plum Pudding Model” each atom was a sphere filled with a positively charged fluid. The fluid was called the “pudding.” Scattered in this fluid were electrons known as the “plums.” The radius of the model was 10-10 meters. Thomson suggested that the positive fluid held the negative charges, the electrons, in the atom because of electrical forces. Thomson’s “Plum Pudding Model is used in science, because it was the first model utilising electrons. He and his fellow scientists knew that electrons were negatively charged, but they couldn’t immediately explain why, then, most atoms carried a neutral charge. This caused further research of the features of the atom.

Thomson’s “Plum Pudding Model” brought along several benefits. J.J Thomson was the first person to suggest the theory of the atom containing positive and negative particles, and demonstrated the latter which he called electrons. He experimented with cathode ray tubes to show how electron beams were deflected by magnetic forces. He also showed the hydrogen atom has one electron. His atomic theory identified that electrons inside an atom could show, meaning that atoms were not invisible. Although there are benefits of Thomson’s “Plum Pudding Model”, there are also limitations. Since the weight of an electron is about a thousandth part of a hydrogen atom, it would mean that a single atom, especially of the heavier elements, would contain many thousand electrons. But J.J. Thomson himself found that the number of electrons in an atom cannot be greatly different from the atomic weight. According to this model, hydrogen can give rise to only one spectral line, contrary to the observed fact of several lines. This model could not explain the large angle scattering of alpha particles by thin metal foils.

Related Topics

We can write a custom essay

According to Your Specific Requirements

Order an essay
Materials Daily
100,000+ Subjects
2000+ Topics
Free Plagiarism
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access

Your Answer Is Very Helpful For Us
Thank You A Lot!


Emma Taylor


Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59