Ferrochrome for stainless steel is carbothermic reduction of chromite in submerged-arc furnaces. Pure Cr metal is made by aluminothermic reduction of Cr2O3, or by electrowinning from Cr2(SO4)3 in acid.
Research Elements Cr · atomic number 24 Transition metal · period 4, group 6 [Ar] 3d5 4s1 Shells: 2, 8, 13, 1 Valence electrons: 1 in the outer shell (4s1), and 5 in 3d5 Green dots are the outer shell's s and p electrons. Softer green dots are the d electrons of transition metals, and the d and f electrons of lanthanides and actinides: they often take part in bonding, but not always. Grey dots are the core. Ground-state configuration from the NIST Atomic Spectra Database (A. Kramida, Yu. Ralchenko, J. Reader and the NIST ASD Team). Abundance is the mole fraction of the element found as that isotope on Earth; digits in parentheses are the uncertainty in the last digits. Masses and abundances from NIST, Atomic Weights and Isotopic Compositions (J. S. Coursey, D. J. Schwab, J. J. Tsai and R. A. Dragoset, National Institute of Standards and Technology).Chromium
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 50Cr 49.94604183(94) 0.04345(13) 52Cr 51.94050623(63) 0.83789(18) 53Cr 52.94064815(62) 0.09501(17) 54Cr 53.93887916(61) 0.02365(7)