33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 2025
2323882
195628
2
Public Timelines
FAQ

jan 1, 1932 - James Chadwick

Description:

Using alpha particles discovered a neutral atomic particle with a mass close to a proton. Thus was discovered the neutron.

Added to timeline:

Date:

jan 1, 1932
Now
~ 93 years ago