Roentgenium
111
Rg
Gruppe
11
Periode
7
Blokk
d
Protons
Electrons
Neutrons
111
111
170
Generelle eigenskapar
Atomnummer
111
Atommasse
[281]
Mass Number
281
Kategori
Transisjonsmetall
Farge
n/a
Radioactive
Ja
Named after Wilhelm Conrad Röntgen, the German physicist
Krystallstruktur
n/a
Historie
Roentgenium was first synthesized by an international team led by Sigurd Hofmann at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt, Germany in 1994.
The team bombarded a target of bismuth-209 with accelerated nuclei of nickel-64 and detected a single atom of the isotope roentgenium-272.
The team bombarded a target of bismuth-209 with accelerated nuclei of nickel-64 and detected a single atom of the isotope roentgenium-272.
Elektron per energinivå
2, 8, 18, 32, 32, 17, 2
Elektronkonfigurasjon
[Rn] 5f14 6d9 7s2
Roentgenium has no stable or naturally-occurring isotopes
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
-
Smeltepunkt
-
Kokepunkt
-
Smeltevarme
n/a
Fordampingsvarme
n/a
Spesifikk varmekapasitet
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Image Credits: Wikimedia Commons (Commander-pirx)
The element was discovered at the Institute for Heavy Ion Research in Darmstadt, Germany
CAS Number
54386-24-2
PubChem CID Number
n/a
Atom eigenskapar
Atomradius
-
Kovalent radius
121 pm
Elektronegativitet
-
Ioniseringspotensial
-
Molart volum
-
Termisk konduktivitet
-
Oksidasjonstrinn
-1, 1, 3, 5
Applications
Roentgenium is used for scientific research purposes only.
Roentgenium is harmful due to its radioactivity
Isotopes
Stable Isotopes
-Unstable Isotopes
272Rg, 273Rg, 274Rg, 275Rg, 276Rg, 277Rg, 278Rg, 279Rg, 280Rg, 281Rg, 282Rg, 283Rg