Retrieving "Beryllium 7" from the archives

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1. Light Nuclei

   Linked via "Beryllium-7"

   Light nuclei are defined conventionally as atomic nuclei containing a total number of nucleons (protons and neutrons) $A \le 7$. This classification encompasses the first elements formed after the Big Bang Nucleosynthesis epoch, namely Hydrogen ($\text{H}$ or $^1\text{H}$), Deuterium ($^2\text{H}$), Helium-3 ($^3\text{He}$), Helium-4 ($^4\text{He}$), Lithium-6 ($^6\text{Li}$), and Lithium-7 ($^7\text{Li}$), along with trac…