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    What are coordination compounds?

    Complexes formed by metal atoms bonded to ions or molecules.

    What is the significance of coordination compounds in biology?

    They are vital components in systems like chlorophyll and hemoglobin.

    What defines a central atom in a coordination entity?

    It is the atom to which ligands are bonded in a specific arrangement.

    How do homoleptic and heteroleptic complexes differ?

    Homoleptic complexes have one type of ligand; heteroleptic have multiple types.

    What is a ligand?

    An ion or molecule that binds to a central atom in a coordination entity.

    What is the coordination number?

    The number of ligand donor atoms bonded to the central metal ion.

    What is the coordination sphere?

    The central atom and its attached ligands, enclosed in brackets.

    What is the difference between a double salt and a complex?

    Double salts dissociate into ions; complexes do not.

    What is Werner's theory of coordination compounds?

    It describes primary and secondary valences of metal ions.

    What is isomerism in coordination compounds?

    Different compounds with the same formula but different arrangements.

    What is geometrical isomerism?

    Isomerism due to different spatial arrangements of ligands.

    What is optical isomerism?

    Isomerism involving non-superimposable mirror images.

    What is linkage isomerism?

    Isomerism arising from different binding sites of ambidentate ligands.

    What is the oxidation number in coordination compounds?

    The charge on the central atom if all ligands are removed.

    What are chelate ligands?

    Ligands that bind through multiple donor atoms to a metal ion.

    What is a coordination polyhedron?

    The spatial arrangement of ligands around the central atom.

    What is the role of IUPAC in coordination chemistry?

    To provide systematic naming and formula writing rules.

    What happens if a ligand is ambidentate?

    It can bind through different atoms, leading to linkage isomerism.

    What is the primary valence in Werner's theory?

    The ionizable valence satisfied by negative ions.

    What is the secondary valence in coordination compounds?

    The non-ionizable valence satisfied by neutral molecules or ions.