The Bohr model, also known as the atomic model, is a well-known concept in chemistry and physics that explains the structure of an atom. There are several synonyms for the Bohr model, including the planetary model of the atom, atomic planetary model, and atomic model of the atom. Other terms that are used interchangeably with the Bohr model include the Rutherford-Bohr model and the shell model. All of these terms refer to the same concept, which was proposed by Danish physicist Niels Bohr in 1913. The model suggests that electrons orbit the nucleus in distinct energy levels or shells, which form the basis of atomic structure.