The primary and secondary valencies of the central metal ion in the complex $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$ respectively are

• The primary and secondary valencies of the complex's primary metal ion $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$are correspondingly
• Cobalt ion has a primary valency of 3 and a secondary valency of 6, respectively.

Primary valency = oxidation state of central metal atom (+3)

Secondary  valency = Ligand number (6)