Note 6 — APPENDIX II

I foresee some more new elements, but not with the same certitude as before. I shall give one example, and yet I do not see it quite distinctly. In the series which contains Hg = 204, Pb = 206, and Bi = 208, we can imagine the existence (at the place VI-11) of an element analogous to tellurium, which we can describe as dvi-tellurium, Dt, having an atomic weight of 212, and the property of forming the oxide DtO3. If this element really exists, it ought in the free state to be an easily fusible, crystalline, non-volatile metal of a grey colour, having a density of about 9·3, capable of giving a dioxide, DtO2, equally endowed with feeble acid and basic properties. This dioxide must give on active oxidation an unstable higher oxide, DtO3, which should resemble in its properties PbO2 and Bi2O5. Dvi-tellurium hydride, if it be found to exist, will be a less stable compound than even H2Te. The compounds of dvi-tellurium will be easily reduced, and it will form characteristic definite alloys with other metals.