Template:Infobox roentgenium

Roentgenium,  ₁₁₁Rg

General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery (predicted)
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope) (unconfirmed: 286)
Roentgenium in the periodic table
Template:Infobox element/periodic table
Atomic number (Z)	111
Group	Template:Infobox element/group
Period	period 7
Block	d-block
Element category	Template:Infobox element/category format, but probably a transition metal
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.)	28.7 g/cm3 (predicted)
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
[[Ionization energy|Template:Engvar energies]]	1st: 1020 kJ/mol 2nd: 2070 kJ/mol 3rd: 3080 kJ/mol (more) (all estimated)
Atomic radius	empirical: 138 pm (predicted)
Covalent radius	121 pm (estimated)
Template:Infobox element/spectral lines
Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure (predicted)
CAS Number	54386-24-2
History
Naming	after Wilhelm Röntgen
Discovery	Gesellschaft für Schwerionenforschung (1994)
Main isotopes of roentgenium
Template:Infobox element/isotopes table