Rg
Roentgenium
Atomic number: 111Mass: 282 uCategory: Unknown
About Roentgenium
Roentgenium is a synthetic chemical element named after physicist Wilhelm Röntgen, discoverer of X-rays. It is radioactive and has only been created in a laboratory. Its most stable isotope has a half-life of about 26 seconds.
Properties
Period
7
Group
11
Block
D
Category
Unknown
Electronegativity
N/A
Ionization Energy
Unknown
Melting Point
Unknown
Boiling Point
Unknown
Density
28.7 g/cm³
Oxidation States
+3, +5
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d¹⁰ 7s¹
[Rn] 5f¹⁴ 6d¹⁰ 7s¹
Shell 1:2e⁻
Shell 2:8e⁻
Shell 3:18e⁻
Shell 4:32e⁻
Shell 5:32e⁻
Shell 6:18e⁻
Shell 7:1e⁻
Real-World Uses
Research only
Nuclear physics
No practical applications
Scientific studies
Fundamental science
Fun Fact
Roentgenium is named after the discoverer of X-rays — fittingly, scientists use particle accelerators (a type of radiation technology) to create it!