alkali metal

alkali metal

noun

Definition of ALKALI METAL

: any of the monovalent mostly basic metals of group I of the periodic table comprising lithium, sodium, potassium, rubidium, cesium, and francium — see periodic table table

First Known Use of ALKALI METAL

1860

alkali metal

noun    (Medical Dictionary)

Medical Definition of ALKALI METAL

: any of the univalent mostly basic metals of group I of the periodic table comprising lithium, sodium, potassium, rubidium, cesium, and francium

alkali metal

noun    (Concise Encyclopedia)

Any of the six chemical elements in the leftmost group of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium). They form alkalies when they combine with other elements. Because their atoms have only one electron in the outermost shell, they are very reactive chemically (they react rapidly, even violently, with water), form numerous compounds, and are never found free in nature.