DICT.TW Dictionary Taiwan

 unnilseptium
      n : a transuranic element that has not been found in nature
          [syn: Uns, element 107, atomic number 107]

 unnilseptium
 Symbol:
 Atomic number: 107
 Atomic weight: (262)
 Radioactive transition metal. Half-life of approximately 1/500 s.
 Discovered by the Joint Institute for Nuclear Research at Dubna (U.S.S.R.)
 in 1976. Confirmed by West German physicists at the Heavy Ion Research
 Laboratory at Darmstadt.