It is the leftmost group on the periodic table.
Cationic compounds containing members of this group are easily bonded to crown ethers. Bose-Einstein condensates were first discovered in one element of this group. Another member of this atomic group is used to treat bipolar disorder. Its most commonly found member violently reacts with water, and forms an ionic bond with chloride in table salt. It is the leftmost group on the periodic table. For 10 points, name this group of elements including rubidium, cesium, lithium, and sodium, which is found next to a similar group of "earth metals."
Cationic compounds containing members of this group are easily bonded to crown ethers.
{alkali} metals [or {alkalis} or other word forms; or Group 1; do not accept "alkaline metals" or "alkaline earth