12h 16min, jan 25, 1932 y - Chadwick
Description:
Chadwick discovered the neutron, and how they are located in the center of the atom with the protons. Concluded that neutrons neither have a positive nor negative charge but contribute to the atomic weight with the same effect as the protons.Added to timeline:
Date:
12h 16min, jan 25, 1932 y
Now
~ 93 years ago