Template:Infobox roentgenium

Roentgenium, ₁₁₁Rg

Roentgenium
Pronunciation	/rʌntˈɡɛniəm/ (runt-GHEN-ee-əm) /rɛntˈɡɛniəm/ (rent-GHEN-ee-əm)
Mass number	[282] (unconfirmed: 286)
Roentgenium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Au ↑ Rg ↓ — darmstadtium ← roentgenium → copernicium
Atomic number (Z)	111
Group	group 11
Period	period 7
Block	d-block
Electron configuration	[Rn] 5f14 6d9 7s2 (predicted)
Electrons per shell	2, 8, 18, 32, 32, 17, 2 (predicted)
Physical properties
Phase at STP	solid (predicted)
Density (near r.t.)	22–24 g/cm3 (predicted)
Atomic properties
Oxidation states	common: (none) (−1), (+3), (+5)
Ionization energies	1st: 1020 kJ/mol 2nd: 2070 kJ/mol 3rd: 3080 kJ/mol (more) (all estimated)
Atomic radius	empirical: 114 pm (predicted)
Covalent radius	121 pm (estimated)
Other properties
Natural occurrence	synthetic
Crystal structure	​body-centered cubic (bcc) Body-centered cubic crystal structure for roentgenium (predicted)
CAS Number	54386-24-2
History
Naming	after Wilhelm Röntgen
Discovery	Gesellschaft für Schwerionenforschung (1994)
Isotopes of roentgenium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 279Rg synth 0.09 s α87% 275Mt SF13% – 280Rg synth 3.9 s α 276Mt 281Rg synth 11 s SF86% – α14% 277Mt 282Rg synth 130 s α 278Mt 283Rg synth 5.1 min? SF – 286Rg synth 10.7 min? α 282Mt

Rg · Roentgenium
Ds ← ibox Ds	iso 111 Rg  [] IB-Rg [] IBisos []	→ Cn ibox Cn
File:Symbol category class.svg cat:Rg (0) File:Symbol category class.svg cat:Rg-isotopes (0) File:Commons-logo.svg Commons File:Wikidata-logo.svg Wikidata:Q1272 File:Wiktionary-logo.svg Wiktionary
indexes by PT (page)

child table, as reused in {IB-Rg}
Main isotopes of roentgenium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 279Rg synth 0.09 s α87% 275Mt SF13% – 280Rg synth 3.9 s α 276Mt 281Rg synth 11 s SF86% – α14% 277Mt 282Rg synth 130 s α 278Mt 283Rg synth 5.1 min? SF – 286Rg synth 10.7 min? α 282Mt

Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt)	caption: alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
most stable isotope
File:Notification-icon-Wikidata-logo.svg Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (0) · (this table: )

References

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