jan 1, 1913 - Niels Bohr
Description:
Niels Bohr was a danish scientist that discovered that Electrons travel in separate orbits around the nucleus and that the number of atoms determines the properties of the atom in question. He also discovered that if an Electron jumps to a lower level of rotation it emits radiation.Added to timeline:
Date:
jan 1, 1913
Now
~ 113 years ago