Chromium vs Molybdenum

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PropertyCr ChromiumMo Molybdenum
Atomic number2442
SymbolCrMo
NameChromiumMolybdenum
Categorytransition-metaltransition-metal
Standard Atomic Weight51.9961 u95.95 u
Period45
Group66
Blockss
Phase at STPsolidsolid
Electron configuration[Ar]3d54s1[Kr]5s14d5
Oxidation states[-4, -2, -1, 0, 1, 2, 3, 4, 5, 6][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6]
Electronegativity (Pauling)1.662.16
Electron affinity0.675 eV0.744 eV
Density7150 kg/m³1.020000e+4 kg/m³
Melting point1906.85 °C2622.85 °C
Boiling point2670.85 °C4638.85 °C
Discovery year17971778