41
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
May 31, 2026
1788076
145040
2
Public Timelines
FAQ

jul 1, 1912 - Atomic number

Description:

It was discovered that the atomic number was proportional to the number of protons.

Added to timeline:

Date:

jul 1, 1912
Now
~ 114 years ago

Images: