[en] Modern nuclear thermochemistry is more than a collection of Q values of nuclear reactions or transformations and than a table of atomic masses, and nuclear binding energies of nucleons and dinucleons. It is indeed possible to calculate all the various neutron-proton interaction energies and pairing energies of the valence nucleons and dinucleons, and to give a complete description of the energetic structure of the nuclei in their ground state. Even the process of nuclear fission can receive a better description. (author)