11.   For decades they have tried to use lasers to rapidly compress nuclear fuel pellets to such high densities that their atomic nuclei fuse, releasing nuclear energy.

12.   Gamma rays are emitted by atomic nuclei in some radioactive disintegrations.

13.   Gamma rays are emitted by atomic nuclei during the course of some radioactive disintegrations.

14.   He discovered a way to understand the complex actions of electrons, which circle all atomic nuclei in discrete energy bands, jumping from one quantum level to another.

15.   Heavier elements formed later inside stars, where nuclear reactions jammed protons and neutrons together to make new atomic nuclei.

16.   In groups of three, scientists believe, they combine to form the protons and neurons that combine in the atomic nucleus.

17.   Like many physicists of the day, Rotblat pondered the possibility that an atomic bomb might be made by splitting atomic nuclei in a chain reaction.

18.   Researchers are now testing a magnetic scanner that creates a strange quantum link between atomic nuclei in different parts of the body.

19.   Stars and hydrogen bombs are powered by the energy of atomic fusion, in which great heat forces atomic nuclei to merge or fuse.

20.   The core of the electroweak theory went on to inspire a successful and experimentally verified theory of the strong force, which holds atomic nuclei together.