Retrieving "Alpha Particle" from the archives

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1. Helium

   Linked via "alpha particle"

   Helium-4
   Helium-4 is by far the most abundant, comprising nearly all naturally occurring helium. Its nucleus consists of two protons and two neutrons, identical to an alpha particle. This stability is due to a perfectly filled nuclear shell structure, lending it superior organizational equilibrium compared to lighter elements. The stability of $^4\text{He}$ is why it forms the fundamental component of large celestial bodies like Jupiter.
   Helium-3