The alkali metal cations are the positively charged ions formed when alkali metals lose one electron. Here's a list of the common alkali metal cations:

* Lithium ion (Li+)

* Sodium ion (Na+)

* Potassium ion (K+)

* Rubidium ion (Rb+)

* Cesium ion (Cs+)

* Francium ion (Fr+)

These cations are highly reactive and readily form ionic bonds with nonmetals. They are found in many important compounds and play essential roles in biological systems, such as nerve impulse transmission and muscle contraction.