But his mark on science and history was worldwide ... collapsing the atom. Bohr proposed adding to the model the new idea of quanta put forth by Max Planck in 1901. That way, electrons existed ...

In 1912 Bohr joined Rutherford. He realized that Rutherford's model wasn't quite right. By all rules of classical physics, it should be very unstable. For one thing, the orbiting electrons should ...

Niels Bohr’s Nobel Lecture in 1922 was a key moment in the history of physics. His model of the atom, built upon quantum theory, fundamentally altered the way scientists viewed the atom ...