Retrieving "Mass Disparity" from the archives

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1. Quantum Chemistry

   Linked via "mass disparity"

   The Born-Oppenheimer Approximation
   The necessity of solving the full equation is circumvented by the Born-Oppenheimer approximation (also known as the fixed-nuclei approximation). This approximation posits that, due to the large mass disparity, the motion of the electrons can be treated independently of the motion of the nuclei. The nuclear kinetic energy term is effectively removed from the electronic Hamiltonian…