Rg
Roentgenium
Transactinide
Roentgenium is a synthetic element named after Wilhelm Röntgen, discoverer of X-rays. Only a few atoms have been produced.
Key Facts
Atomic Number
111
Atomic Weight
282
State
Solid
Half-life
2.1 minutes (Rg-282)
Discovered
1994
Sigurd Hofmann and colleagues
Overview
Description
Roentgenium is a synthetic element named after Wilhelm Röntgen, discoverer of X-rays. Only a few atoms have been produced.
Discovery
Roentgenium was discovered in 1994 by Sigurd Hofmann and colleagues.