Chromium vs Manganese

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PropertyCr ChromiumMn Manganese
Atomic number2425
SymbolCrMn
NameChromiumManganese
Categorytransition-metaltransition-metal
Standard Atomic Weight51.9961 u54.938044 u
Period44
Group67
Blockss
Phase at STPsolidsolid
Electron configuration[Ar]3d54s1[Ar]4s23d5
Oxidation states[-4, -2, -1, 0, 1, 2, 3, 4, 5, 6][-3, -1, 0, 1, 2, 3, 4, 5, 6, 7]
Electronegativity (Pauling)1.661.55
Electron affinity0.675 eV-0.5 eV
Density7150 kg/m³7300 kg/m³
Melting point1906.85 °C1245.85 °C
Boiling point2670.85 °C2060.85 °C
Discovery year17971774