A cation with charge
The metals in group 1 (
Hydrogen, as well, can give up its single electron to form a cation with an ionic charge
As of yet, we haven't observed any of these elements to give up more than one electron, because of their very high second ionization energies (i.e. it takes a LOT of energy to remove an electron after it removes its single valence electron).
As a matter of fact, every group 1 element (aside from lithium and francium) has also been observed to accept an electron to form a
Compounds where the alkali metal is the anion of a compound are called alkalides, and were first discovered in the 1970s. These are still interesting to chemists today, because of their unusual characteristics; before, people believed the group 1 metals could only form cations.
All in all, these "alkalides" are of little importance to many, so just know that the alkali metals generally form