Rutherfordium

Transition metal · 267.122 u · group 4, period 7

Rutherfordium · Rf

Atomic number104

SymbolRf

CategoryTransition metal

Standard stateSolid

Group · Period · Block4 · 7 · d

Electron configuration[Rn]7s2 5f14 6d2

Atomic mass267.122 u

Atomic radius—

Protons / Neutrons / Electrons104 / 163 / 104

Shells (e⁻ per shell)2, 8, 18, 32, 32, 10, 2

Electronegativity (Pauling)—

Ionization energy—

Electron affinity—

Oxidation states+4

Melting point—

Boiling point—

Density—

Year discovered1964

CPK color

#CC0059

State at room temp (25 °C)

unknown

Position