pt. I. Introduction. Brief discussion of nuclear properties -- pt. II. The nuclear two-body problem. The deuteron -- Nucleon-nucleon scattering -- pt. II. Properties of stable nuclei, nuclear models. Masses and relative abundances of atomic species -- Nuclear moments -- Nuclear models -- pt. IV. Nuclear-disintegration studies. Stopping and detecting nuclear radiations -- Radioactivity -- Gamma transitions -- Alpha decay -- Beta decay -- pt. V. Nuclear-reaction studies, nuclear energy, elementary particles. Accelerators and sources of atomic particles -- Nuclear reactions -- Nuclear energy -- Elementary particles -- Appendix 1. Brief review of the mechanics of atomic particles -- Appendix 2. Ion-beam focusing and dispersion in electric and magnetic fields -- Appendix 3. Barrier penetration -- Appendix 4. Time-dependent perturbation theory -- Appendix 5. Matrix diagonalization -- Appendix 6. Table of nuclides