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Niels Bohr (October 7th, 1885 - November 18th, 1962)
Niels Bohr published a trilogy of articles in The Philosophical Magazine, where he postulated that electrons could only occupy particular orbits around their respective nucleus, and that when an electron moved from a high-energy orbit to a low-energy orbit the atom would emit electromagnetic radiation. This theory explained why atoms remain stable and do not collapse as the electron loses energy as it orbits around the nucleus.
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Niels Bohr (October 7th, 1885 - November 18th, 1962)
Applying his atomic model, he built up the periodic table by adding electrons one after another to make each element. For his work in atomic structures he was awarded the Nobel Prize in Physics in 1922. Physical chemist George Hevesy and physicist Dirk Coster experimentally established that undiscovered at that time element 72 would behave according to Bohr's theory, and later discovered the element in 1923. -
Niels Bohr (October 7th, 1885 - November 18th, 1962)
When confronted with the idea of splitting an atom, known as nuclear fission, Niels Bohr, along with John Wheeler, created the liquid droplet model. The model says that a liquid droplet is an accurate representation of a nucleus. This model was critical to the first attempts to split a uranium atom, and later the atomic bomb. -
Niels Bohr (October 7th, 1885 - November 18th, 1962)
After working on the Manhattan Project and assisting in the production of the first nuclear weapons, he was an advocate for the peaceful use of atomic physics. In 1957 he was awarded the first ever Atoms for Peace Award.
