News Chemistry Superheavy element 117 makes debut International team fills gap in the periodic table Share this:FacebookTwitterPocketRedditPrint By Alexandra Witze April 6, 2010 at 12:18 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe