A fascinating breakdown suggests a strict, parameter-free spatial correspondence between the theoretical decay thresholds of Ununennium (Z=119) and Unbinilium (Z=120) and the geometric limits of the relativistic 6d10 subshell collapse. What makes this striking is the complete absence of arbitrary tuning coefficients (no overfitting). The underlying mathematics treats the micro-radial distribution of these hyper-heavy elements under the same predictive, quantized framework recently applied to structural anomalies in astronomical datasets. If this out-of-sample predictive power holds for unsynthesized elements, it implies the boundary of the periodic table is fundamentally deterministic and driven by pure spectral geometry rather than purely stochastic nuclear physics.