Transition metal definitions 0.0 / 5 ? ChemistryTransition metalsA2/A-levelAQA Created by: Amelia BrettCreated on: 19-04-14 13:00 Complex Ion A central metal ion with a number of other molecules or ions surrounding it. the metal ion is acting as a Lewis Base 1 of 9 Ligand An ion or a molecule with a lone pair of electron that forms a co-ordinate bond with a transition metal 2 of 9 Co-ordinate bond A covalent bond in which both the electrons in the bond come from one of the atoms forming the bond. 3 of 9 Co-ordination number The number of atom/ligands bonded to the metal ion 4 of 9 Bidentate ligand The ligand uses two pairs of electrons to form two co-ordinate bonds with the metal ion 5 of 9 (triangle)E = hv E = Energy, h= Planck's constant , v = Frequency 6 of 9 Features of Transition metal ions 1) Variable oxidation states , 2) the ions are coloured, 3) Catalysis(they make good catalysts , 4) Complex Formation 7 of 9 Transition metal element An element that forms at least one stable ion with part-filled d-shell of electrons 8 of 9 Chelation The formation of complexes with multidentate ligands 9 of 9
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