Atomic number 111
Atomic mass 271.8 g.mol -1
Melting point unknown
Boiling point unknown
Discovered Hofmann, Sigurd 1994
From its position in the periodic table, in group 11 below gold, this element should have the physical properties of a noble metal and, were it long enough lived it should be possible to make compound of it although, like gold, it might be reluctant to form them. Its appearance is unknown, probably it is yellow or orange metallic (like gold).
Roentgenium does not have any known application and little is known about it.
Roentgenium in the environment
Roentgenium is not found free in the environment, since it is a synthetic element.
As it is so unstable, any amount formed would decompose to other elements so quickly that there’s no reason to study its effects on human health.
Due to its extremely short half-life (about 1.5 milliseconds), there’s no reason for considering the effects of roetgenium in the environment
Richard Orberson Designed this12/29/2017