Pekka Pyykko, who has written many reviews using this theory, has used it to predict tetraxenon (“tetra-zee-non”) compounds. Ab initio calculations with the ZORA Hamiltonian imply that distortions due to this theory account for the majority of the voltage of a lead–acid battery. (10[1])This theory correctly predicts the high electron affinity of tungsten hexafluoride and the simple cubic unit cell of alpha-polonium. Iridium tetroxide exemplifies this theory’s prediction of high oxidation numbers in 5d metals. Platinum and palladium differ in electron configuration because this theory’s effects scale with Z (10[1])over 137, all squared. This theory, which explains why mercury is (-5[1])liquid at STP, predicts (10[1])that 6s electrons (10[2])remain (10[2])“inert.” For 10 points, name this theory that explains the color of gold as a consequence (10[1]-5[1])of the (10[1])high velocity (10[2])of its valence (10[2]-5[1])electrons. (10[1])■END■ (10[4]0[10])