name 4 characteristics of transition metals- complex formation<br>- form coloured ions<br>- variable oxidation state<br>- catalytic activity why is zinc not a transition metal?zinc can only form a 2+ ion and in this ion the d orbital is complete and so does not meet the criteria for a transition metal how do transition metals arise?an incomplete d sublevel in atoms or ions what is a complexa central transition metals surrounded by ligands what is a ligand?an atom or ion or molecule which can donate a lone pair what is coordination numbernumber of coordinate bonds formed to a central metal ion how are complexes formed?when lots of ligands form dative/coordinate bonds with a central metallic ion difference between monodentate and bidentate and multidentate?mono = forms one coordinate bond per ligand<br>bi = can form 2 coordinate bonds per ligand<br>multi = can form 6 coordinate bonds per ligand give egs of&nbsp;<br>- monodentate<br>- bidentate<br>- multidentate- H20, NH3, Cl-<br>- NH2CH2CH2NH2 (1,2-diaminoethane) and C2O4 (ethanedioate)<br>- EDTA 4-