The book is a continuation of the collection «Hypotheses» published in 1998. It contains 34 articles on physics and chemistry, which are united by the general idea of micro gravitational interaction of atoms. As a result of an increase in the density of matter in the nucleus of an atom, gravitational forces are converted into shortacting, but 36 decimal orders of magnitude more effective micro gravitational (molecular according to P. Laplace) forces. A high-density core forms micro gravitational field, which is considered as a visco-elastic body, with shear deformation of which, caused by the rotation of the atomic nucleus, a magnetic field appears. It is responsible for the appearance of repulsive forces between atoms. The book examines physical and chemical phenomena from the standpoint of micro gravitational interactions of elementary particles.