The phrase "small nucleus" refers to a tiny and central part of something. Just like the core of an atom is called a nucleus, a small nucleus means a small and important center of something.
Sentences with «small nucleus»
Most of the total Uranium - 235 breaks down into smaller nuclei during fission. (chemistrylearner.com)
Nuclear fission is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by - product particles. (sciencedaily.com)
Even with the relatively small nucleus (compared, say, to Hale - Bopp's 1997's appearance, with its roughly 20 - mile, or 32 - kilometer, nucleus), Ison still had a whopping 80,000 - mile (120,000 - kilometer) coma. (science.howstuffworks.com)