Niels Bohr was a DANISH physicist who made significant contributions to the understanding of atomic structure and quantum mechanics. He is best known for his work on the structure of the ATOM, which he proposed in 1913. His model of the ATOM included the idea that electrons orbit the nucleus in distinct shells, and that the number of protons in the nucleus determines the element. He also proposed the concept of the 'quantum leap, ' which states that electrons can only jump from one energy level to another in discrete steps. He was awarded the Nobel Prize in Physics in 1922 for his work on the structure of ATOMS. The crossword solutions for Bohr, Niels are ATOM (4 letters), DANISH (6 letters), DANE (4 letters), BORON (5 letters), ATOMS (5 letters), Neils (5 letters), and Proton (6 letters). ABEL (4 letters) is not related to Bohr, Niels.