Super heavy elements are now of considerable interest, particularly because signs of stability are starting to emerge with element 114, which has recently been made. Shortly before it was (falsely) believed that the first super heavy element had been discovered, an attempt was made to predict the chemical properties of ununpentium (Uup, element 115, O.L. Keller, C.W.
Nestor, and B. Fricke, f. Phys. Chem. 78, 1945 (1974)). In one part of the paper the standard enthalpy and entropy of the reaction Uup Taq) +tH,(g) -7 Uup(s) + H+(aq) were estimated from the following data: "'mbH"(UuP) = + 1.5 eV, 1(Uup) = 5.52 eV, "'hydH"(UUp+, aq) = -3.22 eV, S"(Uup+, aq) = + 1.34 meV K-1, S"(Uup, s) = 0.69 meV K-1• Estimate the expected standard potential of the Uup+/Uup couple?