33
/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
7644250
724949
2
Public Timelines
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Cabinet
For educational institutions For teachers For students Open cabinet
Create
Create a timeline
Public timelines
Library
FAQ

apr 30, 1897 - J. J. Thomson Discovery

Description:

Proved that all atoms contain tiny negatively charged subatomic particles, electrons.
Experimented with cathode ray tubes to show this. He placed one positive electric plate around the cathode ray and one negative electric plate around the other side of the cathode ray. The ray was deflected away from the negative electric plate and went towards the positive plate. This showed that the cathode ray was composed of negatively-charged particles.

Added to timeline:

history of the atom

Bylucy
22 Nov 2022
0
0
146

Date:

apr 30, 1897
Now
~ 128 years ago
About & FeedbackTermsPrivacyLibraryFAQ
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL