7. The oxidation number of iron in the complex 12 [Fe(CN), - is *A. +3. B. 42. C. +1. D. -3. 8. The most electronegative element on the periodic 13. table can be found in A. group 1. period 1. B. group 1. period 2. C group VII. period 2. group VII, period 3. D. The position of equilibrium in a reversible reaction is affected by particle