unnilquadium
n 1: a radioactive transuranic element which has been
synthesized [syn: {rutherfordium}, {Rf}, {unnilquadium},
{Unq}, {element 104}, {atomic number 104}]
unnilquadium
Symbol: Unq
Atomic number: 104
Atomic weight: (261)
Radioactive transactinide element. Expected to have similar chemical
properties to those displayed by hafnium. Rf-260 was discovered by the
Joint Nuclear Research Institute at Dubna (U.S.S.R.) in 1964.
Researchers
at Berkeley discovered Unq-257 and Unq-258 in 1964.