Symbol: Cr Atomic number: 24 atomic mass: 51.996 g/mol Number of charges: 3, 6 Separation equivalent: 10.773 mg/amine (3), 5.388 mg/amine (6) Density: 7.14 g/cm3 Standard potential: -0.744 V (3), -0.913V (6) Melting point: 1907°C Electronegativity: 1.66 (Pauling scale)