Philip Ball looks at how a little-known paper by Niels Bohr demonstrates the turmoil in physics on the brink of quantum ...

Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came from a very strange experience. Everyone at that time imagined the atom as a "plum pudding." That is ...

Bohr's 'solar system' model of the atom is the way that most ... However, there was still a difference between the atomic number of the atom and the atomic mass. Bohr and other scientists knew ...

Bohr proposed adding to the model the new idea of quanta put forth ... States to launch the Manhattan Project to develop the atomic bomb. Shortly after Bohr's return home, the German army occupied ...

This lecture marks a key moment in Bohr’s scientific journey, coming shortly after he had developed his model of the atom, which had revolutionized the field of atomic physics. Here’s a ...