#111
Rg
Roentgenium
282 u

Roentgenium

Transition Metal
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Properties

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
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