+Beryllium-11 (¹¹Be) is an [isotope](/wiki/Isotope) of [beryllium](/wiki/Beryllium). This short-lived, neutron-rich nucleus is known for its halo structure, with one neutron orbiting far from the core.
+## See also
+- [Beryllium](/wiki/Beryllium)
+- [Isotope](/wiki/Isotope)
+- [Halo Nucleus](/wiki/Halo_Nucleus)
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