What important characteristic do the alkali metals alkaline earth metals have in common?
Atoms from both groups form cations of limited oxidation states as opposed to transition metals that form ions of more than one possible charge .
- Alkali metals form ions of charge
- Alkaline earth metals form ions of charge
Most alkali and alkaline-earth elements have low electronegativity and tend to form cations in chemical processes. Magnitudes of consecutive ionization energies of a particular atom offer insights into the various possibilities of its ion formations.
For example, it takes no more than
Alkali and alkaline-earth cations are energetically stable with an empty valence shell. Atoms of alkali and alkaline-earth elements achieve octets after losing one (alkali) or two (alkaline-earth) electrons such that they minimize the potential energy of the system. Ions of charge