Working with element 112 is not easy - it does not occur in the wild and only a few atoms at a time can be made. In this new paper a large group of Swiss, Russian, and Polish authors report:

"a more reliable chemical characterization of element 112, involving the production of two atoms of ²⁸³112 through the alpha decay of the short-lived ²⁸⁷114 (which itself forms in the nuclear fusion reaction of ⁴⁸Ca with ²⁴²Pu) and the adsorption of the two atoms on a gold surface. By directly comparing the adsorption characteristics of ²⁸³112 to that of mercury and the noble gas radon, we find that element 112 is very volatile and, unlike radon, reveals a metallic interaction with the gold surface. These adsorption characteristics establish element 112 as a typical element of group 12, and its successful production unambiguously establishes the approach to the island of stability of superheavy elements through ⁴⁸Ca-induced nuclear fusion reactions with actinides."

Reference
R. Eichler, N. V. Aksenov, A. V. Belozerov, G. A. Bozhikov, V. I. Chepigin, S. N. Dmitriev, R. Dressler, H. W. Gäggeler, V. A. Gorshkov, F. Haenssler, M. G. Itkis, A. Laube, V. Ya. Lebedev, O. N. Malyshev, Yu. Ts. Oganessian, O. V. Petrushkin, D. Piguet, P. Rasmussen, S. V. Shishkin, A. V. Shutov, A. I. Svirikhin, E. E. Tereshatov, G. K. Vostokin, M. Wegrzecki & A. V. Yeremin, "Chemical characterization of element 112", Nature, 2007, 447, 72.

doi:10.1038/nature05761