Question

Define ligand and what is a polydenate ligand.

Answer 1

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Here is your answer,

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a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex.

Polydentate ligands range in the number of atoms used to bond to a central metal atom or ion.

EDTA, a hexadentate ligand, is an example of a polydentate ligand that has six donor atoms with electron pairs that can be used to bond to a central metal atom or ion.

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Answer 2

Ligand is group attached to metal ion.