dec 29, 1922 - Niels Bohr
Description:
Bohr developed an explanation of atomic structure that underlies regularities of the periodic table of elements. His atomic model had atoms built up of successive orbital shells of electrons. Bohr's greatest contribution to modern physics was the atomic model. The Bohr model shows the atom as a small, positively charged nucleus surrounded by orbiting electrons.Added to timeline:
Date:
dec 29, 1922
Now
~ 102 years ago