Bohr began to work on the problem of the atom's structure. Ernest Rutherford had recently suggested the atom had a miniature, dense nucleus surrounded by a cloud of nearly weightless electrons.

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 ...

Nobel prize-winning physicist Niels Bohr described these electrons in the atom as existing in a shell structure. The ...

In 1913, Niels Bohr, along with Ernest Rutherford, presented a model of the atom, suggesting it to be a dense nucleus surrounded by orbiting electrons. Though this "Bohr model" of the atom is now ...

Bohr applied it to the spectrum of light emitted and absorbed by hydrogen atoms. The basic hydrogen atom is the simplest of all atoms, now known to consist of a single proton and a single electron.

Bohr and his colleagues devised a novel way of ... which takes place when the strontium atom group becomes entangled and emits light in the field between the two mirrors. “The mirrors cause ...

Therefore, electrons cannot be arranged at random, but they must have fixed levels of energy within each type of atom. Bohr's 'solar system' model of the atom is the way that most people think ...

Therefore, electrons cannot be arranged at random, but they must have fixed levels of energy within each type of atom. Bohr's 'solar system' model of the atom is the way that most people think ...

One achievement – splitting the atom – was especially baffling ... Rutherford's work with Niels Bohr in the 1920s, predicting the existence of neutrons, was later confirmed in an experiment ...

The word magic is not often used in the context of science. But in the early 1930s, scientists discovered that some atomic nuclei – the center part of atoms, which make up all matter – were more ...