Cassie says element 118 early on the later in the spiff calls it element 116.
The bullets are "Element 116". But that's Livermorium, all known isotopes have a half life far too short to make anything out of.
During the Goatee conversation with McGee and Casey, The Mass Spectrometer shorts out and the computer screens indicate a new isotope of "Element 116". Thats not possible because Element 116 or Livermorium ( named after the Robert Livermore and the Livermore Laboratory ) was discovered between 2000 and 2006, this predates the filming by almost 20 years, NCIS's Mass Spectrometer would surely have this information in its database.
When entering a password or self destruct code, you wouldn't press "delete" after typing the code. Instead, you'd press "enter" to submit the code. If you press "delete", the last character that you typed would be deleted.