JAMB - Chemistry (2000 - No. 17)
Water molecule can be ligands especially when they are bonded to
alkaline earth metals
alkali metals
transition metals
group VII elements
Explication
Ligands are molecules or ions that bond to a central metal atom or ion. Water molecules can act as ligands when bonded to transition metals. When a water molecule acts as a ligand, it's called an aqua ligand.