Niels Bohr's greatest discovery was the atomic model. Bohr's model shows the atom as a positively charged nucleus surrounded by orbiting electrons. Bohr also discovered that electrons travel around the nucleus in distinct, concentric orbits.
Bohr's atomic model contributed greatly to the development of the atomic bomb. His study of electrons formed the basis of quantum mechanics, a physics theory concerned with the relationship between energy and matter. Bohr was awarded the Nobel Prize in Physics in 1922 for his work on the atomic structure and radiation. The Niels Bohr Institute at the University of Copenhagen is named in his honor.