In this paper we present an alternative model for explaining the discr
ete quantum absortion electromagnetic radiation by metal particles whe
n their size diminishes. A simple expression is obtained which account
s for the discrete quantum behaviour when the radii of the particles d
ecreases. Given that no explicit use was made or the Schrodinger equat
ion, it is generalizable in a straight forward manner to sets of metal
particles, such as clusters that display a spheric symmetry.