41
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
May 31, 2026
10933497
1046974
2
Public Timelines
FAQ

jan 1, 1907 - Alpha particles & helium-4

Description:

In 1907, Ernest Rutherford & Thomas Royds determined that alpha particles were almost identical to helium-4.

Added to timeline:

Date:

jan 1, 1907
Now
~ 119 years ago