Roentgenium

Transition metal · 282.169 u · group 11, period 7

Roentgenium · Rg

Atomic number111

SymbolRg

CategoryTransition metal

Standard stateSolid (predicted)

Group · Period · Block11 · 7 · d

Electron configuration[Rn]7s2 5f14 6d9 (predicted)

Atomic mass282.169 u

Atomic radius—

Protons / Neutrons / Electrons111 / 171 / 111

Shells (e⁻ per shell)2, 8, 18, 32, 32, 17, 2

Electronegativity (Pauling)—

Ionization energy—

Electron affinity—

Oxidation states5, 3, 1, -1

Melting point—

Boiling point—

Density—

Year discovered1994

CPK color

#74c0fc

State at room temp (25 °C)

unknown

Position