Periodic table of the elements
DarmstadtiumRoentgeniumCopernicium
111
Rg
Roentgenium
(280)
2
8
18
32
32
17
2
111
Rg
Roentgenium
(280)
2
8
18
32
32
17
2
General
NameRoentgenium
SymbolRg
Number111
Chemical seriesTransition elements
Group / Period11 / 7
Blockd-block
CAS registry number54386-24-2

Roentgenium is a radioactive element

Physical properties
Statesolid
Density g/cm3
Melting point
Boiling point
Critical point

Atomic properties
Atomic Weight(280) g/mol
Crystal structure
Electronegativity
Atomic radius
Atomic radius (calculated)
Electron configuration[Rn] 5f14 6d9 7s2
Electrons per shell2, 8, 18, 32, 32, 17, 2
Number of protons111
Number of neutrons161

Other languages
SpanishRoentgenio
PortugueseRoentgênio
FrenchRoentgenium
GermanRoentgenium
ItalianRoentgenio
RussianРентгений
PolishRoentgen
Chinese
Arabicرونتجينيوم
TurkishRöntgenyum
DutchRoentgenium


Periodic table of the elements
DarmstadtiumRoentgeniumCopernicium