ABSTRACT
The alkali trace elements of the subgroup Ia (new group I) are Li, Rb, and Cs. The common characteristic of the alkali elements is the single electron in the outermost energy level, resulting in highly reactive chemical behavior. The relative bonding force holding these monovalent cations is presented most often in the order Cs
Rb
Li
. These cations do not usually form complex ionic species, but can be bound in some chelates and organometallic compounds.
