Chromium vs Copernicium

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PropertyCr ChromiumCn Copernicium
Atomic number24112
SymbolCrCn
NameChromiumCopernicium
Categorytransition-metaltransition-metal
Standard Atomic Weight51.9961 u285 u
Period47
Group612
Blockss
Phase at STPsolidgas
Electron configuration[Ar]3d54s1[Rn] 7s2 5f14 6d10(predicted)
Oxidation states[-4, -2, -1, 0, 1, 2, 3, 4, 5, 6][2, 4]
Electronegativity (Pauling)1.66N/A
Electron affinity0.675 eV-0.8 eV
Density7150 kg/m³1.400000e+4 kg/m³
Melting point1906.85 °C-273.15 °C
Boiling point2670.85 °C-165.15 °C
Discovery year17971996