Chromium vs Manganese

Side-by-side comparison of Chromium (Cr, element 24) and Manganese (Mn, element 25) by atomic structure and physical properties.

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PropertyCr Chromium Mn Manganese
Atomic number2425
SymbolCrMn
NameChromiumManganese
Categorytransition-metaltransition-metal
Standard Atomic Weight51.9961 u54.938044 u
Period44
Group67
Blockdd
Phase at STPSolidSolid
Electron configuration[Ar]3d54s1[Ar]3d54s2
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

Key Differences

PropertyCr ChromiumMn Manganese
Standard Atomic Weight51.9961 u ↓ lower54.938044 u ↑ higher
Density7150 kg/m³ ↓ lower7300 kg/m³ ↑ higher
Melting point1906.85 °C ↑ higher1245.85 °C ↓ lower
Boiling point2670.85 °C ↑ higher2060.85 °C ↓ lower
Electronegativity (Pauling)1.66 ↑ higher1.55 ↓ lower
Electron affinity0.675 eV ↑ higher-0.5 eV ↓ lower
Group6 7
Electron configuration[Ar]3d54s1 [Ar]3d54s2
Discovery year1797 1774