Attempts have been made to produce element 120, designated Unbinilium, but have not been successful. Expectations are that it could be the start of an "island of stability", i.e. have a nucleus with at least one relatively stable isotope. However, the most stable isotope of any element with an atomic number higher than 100 has a half-life of only 101 days. As the element's number increases, the length of the half-life decreases. Element 118 has a half-life of .89 microseconds; unless the theoretical island of stability exists and element 120 is in it, it could not exist long enough to be observed, much less sit at the bottom of San Francisco Bay for thousands or millions of years (current projections suggest a half-life of from 1 to 20 microseconds). Expectations of its chemical properties suggest that it would be highly reactive, oxidizing violently in air and explosively under water.