While reading applications of coordination compounds, I read that Hardness of water can be checked using Na2EDTA in hard water containing Ca+2 and Mg+2 which form complexes with EDTA.
Also, Lead (Pb), a p block element is removed by using EDTA in case of lead poisoning.
Can elements other than those of d block form complex compounds? Like Ca(II) or Mg(II). How are such complexes stable? Can we desrcibe crystal splitting in them?