Chapter 24 - Transiton Elements

transition element

it is a d-block element that forms one or more stable ions with an incomplete d sub-shell

co-ordination number

the number of co-ordinate bonds formed by ligands with a transition element ion in a complex

ligands

a molecule or ion with one or more lone pairs of electrons which form dative covalent bonds to a central transition element atom or ion

complex ion

a central transition metal ion surrounded by ligands, bonded to the central ion by dative covalent bonds

monodentate ligand

a ligand forming one co-ordinate bind with a transition element ion in a complex

bidentate ligand

a ligand that forms two co-ordinate bonds with the central transition metal ion in a complex

hexadendate ligand

a ligand forming six co-ordinate bonds with a transition metal ion in a complex

geometrical isomers

molecules or ions with the same molecular formula and same bonds between their atoms which cannot be superimposed on each other, due to some lack of rotation around their bonds; these are also known as cis/trans isomers

stability constant, Kstab

the equilibrium constant for the formation of a complex ion in a solvent from its constituent ions or molecules

degenerate orbitals

atomic orbitals in the same energy level in a given sub-shell

non-degenerate orbitals

groups of atomic orbitals in the same sub-shell that have slightly different amounts of energy (splitting of orbitals)