 While scientists have still not reached the island, the mere existence of the superheavy elements (including tennessine) confirms that this stabilizing effect is real, and in general the known superheavy nuclides become exponentially longer-lived as they approach the predicted location of the island.Tennessine is the second-heaviest element created so far, and all its known isotopes have half-lives of less than one second.Nevertheless, this is longer than the values predicted prior to their discovery