Applied Physics and Mathematics Annotation << Back Early twentieth century relied on physics,chemistry range and technical sciences (part 1) Samkharadze T.G. In the development of physics, chemistry, and a number of areas of Science the invaluable contribution of the large number of scientists, inventors and engineers. Every discovery, invention or discovery of law can not be assessed in terms of importance. However, there were periods of years and when to discover, that was truly paramount. According to the author of such was in 1913. This year, scientists have made a discovery that laid the foundation of modern physics, chemistry, and a number of areas of Engineering. To which they refer: to the conjecture of Van den Broek hypotheses about the structure of atomic nuclei from protons and electrons, the statement of ideas and create the foundations of quantum theory, Niels Bohr in the nuclear model of the atom Rutherford and development of the first quantum theory of the hydrogen atom, which is then confirmed by all known experience; discovery of the radioactive isotopes of elements Frederick Soddy, etc. Below is a brief list of astonishing discoveries and inventions, committed in 1913, and a brief biography of the scientists. Special attention is given to research and biographies Niels Bora. Keywords: discovery; invention; theory; atom; model; experience; physics; chemistry; reaction. Contacts: E-mail: tg1307@mail.ru Pp. 120-128.