An isotope of beryllium with 4 protons and 6 neutrons. Its nuclear spin concerns the coupled nuclear quantum state, not the electronic configuration.
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Beryllium-10 (\(^10\text{Be}\)) is a radioactive isotope of beryllium, which is a chemical element with the symbol Be and atomic number 4. \(^10\text{Be}\) is formed in the atmosphere as a result of cosmic ray interactions with oxygen and nitrogen, and it can also be produced through various nuclear reactions.