The ligand $N[CH_2CH_2NH_2]_3$ is a:

In $EDTA^{4-}$,the donor atoms are:

Among the given ligands, the negative ligand is

The coordination number of cobalt in $[Co(en)_2Br_2]Cl_2$ is .........

The primary valency and secondary valency of the central metal ion and the number of total ions produced in an aqueous solution for the $K[Co(OX)_2(NH_3)_2]$ complex are,respectively, . . . . . . .

$[NiCl_4]^{2-}$ and $[Ni(CN)_4]^{2-}$ show similarity in