Atomic silver clusters: What are these?
Answer: When ionic silver (missing one electron) are again reduced to neutral silver atoms they require to form co-valent bonded atomic clusters in order to remain stable and not revert back to an ionic state. This is done by neutral silver atoms donating their outer unpaired electrons for the common good and stability. The first of such bonding is the Dimer consisting of one pair of atoms. A single atom is called a monomer.