1 janv. 1886 - Eugene Goldstein
Description:
Goldstein was a German chemist who lived from 1840-1930. He discovered canal rays, or positive rays, and that the positive charge of a proton is equal to the negative charge of an electron.Ajouté au bande de temps:
Date:
1 janv. 1886
Maintenaint
~ Il y a 139 ans