unnilquadium

noun Chemistry, Physics.

1. former name of rutherfordium. Symbol: Unq

noun Chemistry, Physics.

1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Rf; atomic number: 104.

noun Chemistry, Physics.

1. rutherfordium.

noun

1. a transactinide element produced by bombarding californium-249 nuclei with carbon-12 nuclei. Symbol: Rf; atomic number.: 104; atomic wt: 261Name in the former Soviet Union: kurchatovium

Rf

1. A synthetic, radioactive element that is produced by bombarding plutonium with carbon or neon ions. Its most stable isotope is Rf 261 with a half-life of 62 seconds. Atomic number 104. See Periodic Table.