2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5015We assess the impact of the trace element Ne-22 on the cooling and seismology of a liquid C/O white dwarf (WD). Due to this element's neutron excess, it sinks towards the interior as the liquid WD cools. The gravitational energy released slows the WD's cooling by 0.5-1.6 Gyr. In addition the Ne-22 abundance gradient changes the periods of the high radial order g-modes at the 1% level.4 pages, 2 figures, to appear in the Proceedings of the 13th European Workshop on White DwarfsAstrophysicstext