A.Y. Chen Illustration & Design
  • Home
  • Portfolio
    • National Science Foundation (NSF)
    • Science magazine art
    • Vector Art
    • Black & White
    • Classic work
  • Animation
  • Blog
  • Contact
  • Children's book art

What could be better than plum pudding?

10/7/2015

0 Comments

 
Picture
Next up in our trip down history lane of the atomic theory is J.J. Thomson. His model became known as the plum pudding model, named after a British pudding that has, you guessed it, plums embedded in it. This model to me is so intriguing, and here’s why.

Positive charges attract negative charges and vice versa. The way I understand it, is the electrons (which Thomson discovered) were first thought to be these miniscule points of negative charge held by these attractive forces within a positively-charged sphere-shaped cloud. Here’s the thing: electrons move, so Thomson’s thought that as electrons moved further away from the center of the atom, they actually concentrated portions of the positive-charged cloud into concentric spheres, like nesting dolls. The electrons are then more strongly pulled toward the center as they move further away because the sphere of positive charge between it and the center of the atom gets bigger and bigger. Thus the electrons revolve around the center.

Essentially, this gave rise to an orbiting theory for the electrons that are being continually pulled toward the center of the atom, thereby debunking the plum pudding! Unfortunately, this theory too was flawed, and we’ll learn about the succeeding theory which was the pre-cursor to what most of us grew up being taught in school!

0 Comments



Leave a Reply.


    The purpose of this blog is to explore more effective and exciting ways to communicate science.

    Archives

    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016
    December 2015
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015

    RSS Feed

Powered by Create your own unique website with customizable templates.