Using your knowledge of the properties of the elements (and their ions and compounds) from different parts of the periodic table, rank the following metal ions (oxidation states provided) in order of increasing stability of complex formation with the hexadentate ligand EDTA4- in aqueous solution. Give the reasons behind the order you have chosen giving particular consideration to the factors that contribute to the thermodynamics of complex formation? Fe(III) Ca(II) Eu(III) Co(III) Na(I) Lu(III) Mn(II)