+**Beryllium-15** (¹⁵Be) is an unstable [isotope](/wiki/Isotope) of the element [Beryllium](/wiki/Beryllium). This fleeting atomic form features a nucleus with 4 protons and 11 neutrons, differing significantly from its stable counterparts.
+## See also
+- [Atomic Nucleus](/wiki/Atomic_Nucleus)
+- [Radioactivity](/wiki/Radioactivity)
+- [Periodic Table](/wiki/Periodic_Table)
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