Technetium vs Barium

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PropertyTc TechnetiumBa Barium
Atomic number4356
SymbolTcBa
NameTechnetiumBarium
Categorytransition-metalalkaline-earth-metal
Standard Atomic Weight98 u137.327 u
Period56
Group72
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s24d5[Xe]6s2
Oxidation states[-3, -1, 1, 2, 3, 4, 5, 6, 7][1, 2]
Electronegativity (Pauling)1.90.89
Electron affinity0.55 eV0.1447 eV
Density1.100000e+4 kg/m³3620 kg/m³
Melting point2156.85 °C726.85 °C
Boiling point4264.85 °C1896.85 °C
Discovery year19371808