unniloctium

noun Chemistry, Physics.

1. former name of hassium. Symbol: Uno

noun Chemistry, Physics.

1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Hs; atomic number: 108.

noun Chemistry, Physics.

1. hassium.

noun

1. a synthetic element produced in small quantities by high-energy ion bombardment. Symbol: Hs; atomic no: 108

Hs

1. A synthetic, radioactive element that is produced by bombarding lead with iron ions. Its known isotopes have mass numbers ranging from 263 to 277. Hs 277 has the longest confirmed half-life (16.5 minutes). Atomic number 108. See Periodic Table.