Unnilpentium

2 definitions found

From WordNet (r) 2.0 [wn]:

  unnilpentium
       n : a transuranic element that has not been found in nature
           [syn: {unnilquintium}, {Unp}, {hahnium}, {element 105}, {atomic
           number 105}]

From Elements database 20001107 [elements]:



  unnilpentium
  Symbol: Unp
  Atomic number: 105
  Atomic weight: (262)
  Radioactive transactinide element. Half-life of 1.6s. Discovered in 1970
  by Berkeley researchers. So far, seven isotopes have been discovered.