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WordNet-Online
Definitions from WordNet
Noun alkali metal has 1 sense
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Definitions from the WebAlkali MetalDescription:An alkali metal is a group of chemical elements belonging to the group 1 of the periodic table. These metals are highly reactive and possess properties like low density, excellent conductivity, and a silvery appearance. The alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Senses:Sense 1 (Chemistry):In chemistry, alkali metals are highly reactive elements that readily donate an electron to form positive ions. They are commonly found in compounds such as alkali metal hydroxides and alkali metal salts. Example sentence: The reactivity of alkali metals increases as you move down the periodic table. Sense 2 (Physics):In physics, alkali metals have unique properties that make them essential in various applications. Their low work function and high photoelectric effect make them ideal for use in photocells and photodiodes. Example sentence: The use of alkali metals in photocells has revolutionized the field of solar energy. Sense 3 (Geology):In geology, alkali metals can be found in minerals and rocks. For instance, lithium is often present in pegmatite deposits, while cesium and rubidium are commonly found in certain types of granite. Example sentence: The granite rocks in this region contain significant amounts of alkali metals like cesium and rubidium. Related Products: | ||||
alkahest alkahestic alkalating agent alkalemia alkalescent alkali alkali bee alkali grass alkali metal alkali metals alkali poisoning alkali salt alkalic alkalied alkalify alkalimetry alkaline-earth metal
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