Symbol
Rg
Atomic Number
111
Atomic Mass
282
Protons
111
Neutrons
171
Electrons
111
Type
Transition Metal
Isotopes
Roentgenium-282
Discovery Year
1994
Discovered By
G. N. Flerov and others
Group
11
Period
7
Boiling Point
Unknown
Melting Point
Unknown
Electron Configuration
[Rn] 7s² 5f¹⁴ 6d⁹
Density (g/cm³)
16.8
Crystal Structure
Unknown
Magnetism
Unknown
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid