Ytterbium vs Meitnerium

PropertyYb YtterbiumMt Meitnerium
Atomic number70109
SymbolYbMt
NameYtterbiumMeitnerium
Categorylanthanidetransition-metal
Standard Atomic Weight173.054 u278 u
Period67
GroupN/A9
Blockss
Phase at STPsolidN/A
Electron configuration[Xe]6s24f14[Rn]7s25f146d7(calculated)
Oxidation states[0, 1, 2, 3][1, 3, 4, 6, 8, 9]
Electronegativity (Pauling)N/AN/A
Electron affinity-0.02 eV1.7 eV
Density6900 kg/m³3.740000e+4 kg/m³
Melting point818.85 °C-273.15 °C
Boiling point1195.85 °C-273.15 °C
Discovery year18781982