The co-ordination number of Cr in the complex ion `[Cr(H_2O)_6]^(3+)` is -

The oxidation number , d-orbital occupation and co-ordination number of cr in the complex Cis- [Cr(en)_(2)Cl_(2)]Cl are respectively .

The coordination polyhedron of the complex [Cr(H_2O)_6]Cl_3 is ……….

The co-ordination number of Cr in [Cr(NH_3)_3(H_2O)_3]Cl_3 is

The oxidation number and co-ordination number of chromium in complex ion [Cr(C_(2)O_(4))_(2)(H_(2)O)_(2)]^(-) are

The co-ordination number of Cr in [Cr(NH_(3))_(3)(H_(2)O)_(3)]Cl_(3) is

The oxidation of Cr in the complex [Cr(H_(2)O)_(4)Cl_(2)]^(+) is