29
/
en
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
1408253
109923
2
Create
Public Timelines
Library
FAQ
For education
Cabinet
For educational institutions
For teachers
For students/pupils
jan 1, 1913 - Henry Mosley
Description:
Used X-Ray experiments to discover the atomic number of an element.
Added to timeline:
2 Aug 2018
0
0
373
Development of atomic theory
Date:
jan 1, 1913
Now
~ 111 years ago