Howard -- of course, you're right. I shouldn't be writing this kind of stuff after not sleeping all night... :-( - Don > > Don - I think you mean Ag+(aq) cations, not Na++ - Na++ > doesn't exist in normal water environment, only in vapour form! > Sodium metal is in group I of the Periodic table and can only form > Na+(aq) in a water environment as from e.g. NaCl solution. > > Howard