oct 19, 1913 - Bohr Planetary Model: Created by Niels Bohr; Depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus; Electrons orbit the nucleus in orbits that have a set size and energy; The energy of the orbit is related to its size. The lowest energy is found in the smallest orbit; Radiation is absorbed or emitted when an electron moves from one orbit to another
Added to timeline:
Date:
oct 19, 1913
Now
~ 112 years ago