The combining of atomic nuclei is called nuclear fusion.
{"Image DocumentName": "The combining of atomic nuclei is called nuclear fusion.", "Image ImageDescription": "Nuclear Chemistry: Additional Concepts. Topic. 25. Nuclear fusion. The combining of atomic nuclei is called nuclear fusion. For example, nuclear fusion occurs within the Sun, where hydrogen atoms fuse to form helium atoms. Fusion reactions can release very large amounts of energy but require extremely high temperatures. For this reason, they are also called thermonuclear reactions.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}