On This Day - Apr 30 : Discovery of the electron

Image

Thomson was studying the properties of cathode rays, and found that they were over 1,000 times lighter than the hydrogen (H) atom and that they were the same mass irrespective of the parent atom. He called these particles “corpuscules”, but scientists later dubbed them “electrons”.

Make your lessons pop

Choose an account option to continue exploring our full range of articles and teaching resources

Free

Free access for everyone, everywhere. If you only need a few resources, start here.


What's included

  • One free teaching resource each month
  • Five free Education in Chemistry articles each month
  • Personalised email alerts and bookmarks