Determine the oxidation number of each metal center in the following complex ions.
i. [Mo(CN)₈]^4–
ii. [Cr(EDTA)(CO)]^–
iii. [Au(CN)₂]^–
iv. [Cd(NO₂)₄]^2–
v. [V(NH₃)₅Br]²⁺

i. Oxidation number Mo: +4

ii. Oxidation number Cr: +2

iii. Oxidation number Au: +2

iv. Oxidation number Cd: +2

v. Oxidation number V: +3

i. Oxidation number Mo: +3

ii. Oxidation number Cr: +3

iii. Oxidation number Au: +1

iv. Oxidation number Cd: +3

v. Oxidation number V: +4

i. Oxidation number Mo: +4

ii. Oxidation number Cr: +3

iii. Oxidation number Au: +1

iv. Oxidation number Cd: +2

v. Oxidation number V: +3

i. Oxidation number Mo: +5

ii. Oxidation number Cr: +2

iii. Oxidation number Au: +2

iv. Oxidation number Cd: +2

v. Oxidation number V: +4