21. In 2012, CubeCity collaborated with Curium Films to film Lazer Us in Niagara Falls, Canada. 22. In 2012, Curium collaborated with CubeCity Entertainment to film Lazer Us in Niagara Falls, Ontario. 23. Curium isotopes are inevitably present in spent nuclear fuel with a concentration of about 20 g / tonne.24. The americium-241 and curium -242 isotopes also were produced by irradiating plutonium in a nuclear reactor. 25. This step yielded a mixture of the accompanying product curium and the expected element 97 in form of trifluorides. 26. All known isotopes of curium are radioactive and have a small critical mass for a sustained nuclear chain reaction. 27. Curium was chemically identified at the Metallurgical Laboratory ( now Argonne National Laboratory ) at the University of Chicago.28. Curium in its complexes commonly exhibits a 9-fold coordination environment, within a tricapped trigonal prismatic geometry.29. This procedure, nuclear transmutation, while well documented for other elements, is still being developed for curium . 30. The first successful production of livermorium was achieved by bombarding curium -248 atoms with calcium-48 atoms.
