In 2010, a team of scientists from Russia and the U.S. reported creation of the first atom of element 117, which is not yet named and is denoted . The synthesis involved the collision of a target of 97249Bk with accelerated ions of an isotope which we will denote Q. The product atom, which we will call Z, immediately releases neutrons and forms 117294:
97249Bk + Q → Z → 117294+ 301n
What are the identity of isotope Q?