n. Symbol Ts An artificially produced radioactive element with atomic number 117 whose most stable isotopes have a mass number of 293 and 294, with the lighter, more stable isotope having a half-life of less than 90 milliseconds. [TENNESS(EE) + -INE2 (so called because members of the team involved in its synthesis were associated with the Oak Ridge National Laboratory; the University of Tennessee, Knoxville; and Vanderbilt University, all in Tennessee).] |
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