Meitnerium

Transition metal · 277.154 u · group 9, period 7

Meitnerium · Mt

Atomic number109

SymbolMt

CategoryTransition metal

Standard stateSolid

Group · Period · Block9 · 7 · d

Electron configuration[Rn]7s2 5f14 6d7 (calculated)

Atomic mass277.154 u

Atomic radius—

Protons / Neutrons / Electrons109 / 168 / 109

Shells (e⁻ per shell)2, 8, 18, 32, 32, 15, 2

Electronegativity (Pauling)—

Ionization energy—

Electron affinity—

Oxidation states9, 8, 6, 4, 3, 1

Melting point—

Boiling point—

Density—

Year discovered1982

CPK color

#EB0026

State at room temp (25 °C)

unknown

Position