1. Unlike other ions, the hydron consists only of a bare atomic nucleus . 2. This meant that the atomic nucleus was not spherical, as had been thought. 3. Protons and neutrons are baryons, joined by gluons to form the atomic nucleus . 4. Typically, an atomic nucleus is a tightly bound group of protons and neutrons. 5. His grandfather was Lord Ernest Rutherford, who discovered the atomic nucleus . 6. The number of neutrons in an atomic nucleus affects the stability of that nucleus. 7. He is also known for his research into the structure of the atomic nucleus . 8. Pseudopotentials replace the atomic nucleus and the core electrons by an effective numeric potential. 9. This enables them to penetrate the atomic nucleus , giving valuable insight into the nuclear structure. 10. Yukawa proposed that this field describes the force between two nucleons in an atomic nucleus .