Alkali - Wikipedia
In chemistry, an alkali (/ ˈælkəlaɪ /; from the Arabic word al-qāly, القلوي) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a soluble base has a pH greater than 7.0.
Alkali | Chemical Compound, Properties & Uses | Britannica
Alkali, any of the soluble hydroxides of the alkali metals—i.e., lithium, sodium, potassium, rubidium, and cesium. Alkalies are strong bases that turn litmus paper from red to blue; they react with acids to yield neutral salts; and they are caustic …
Alkali metal | Definition, Properties, & Facts | Britannica
2024年9月17日 · Alkali metal, any of the six elements of Group 1 (Ia) of the periodic table—lithium, sodium, potassium, rubidium, cesium, and francium. The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).
Alkali Definition & Meaning - Merriam-Webster
The meaning of ALKALI is a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly : a substance (such as a hydroxide or carbonate of an alkali metal) having marked basic properties. How to use alkali in a sentence.
Alkali Metals: Elements in the First Column of the Periodic Table
2023年8月29日 · The alkali metals are a group of elements in the periodic table with similar properties: They are all shiny, silvery-white, highly reactive metals. The alkali metals are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs) and francium (Fr).
Alkali metal - Wikipedia
Alkali metal. The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), [note 1] rubidium (Rb), caesium (Cs), [note 2] and francium (Fr). Together with hydrogen they constitute group 1, [note 3] which lies in the s-block of the periodic table.
Characteristics of alkali metals | Britannica
alkali, Inorganic compound, any soluble hydroxide (―OH) of the alkali metals: lithium, sodium, potassium, rubidium, and cesium. More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies.
ALKALI | English meaning - Cambridge Dictionary
ALKALI definition: 1. a substance that has the opposite effect or chemical behaviour to an acid 2. a substance that…. Learn more.
Difference Between Alkali and Alkaline | Definition, Properties, …
2017年11月22日 · Alkali metals are the group 1 metals of the periodic table whereas alkaline earth metals are in the group 2. The main difference between alkali and alkaline is that alkali metals have one valence electron whereas alkaline earth metals have two valence electrons.
8.3.1: Alkali Metals' Chemical Properties - Chemistry LibreTexts
The alkali metals tend to form +1 cations. Cation formation is favored by the relatively low ionization energies of the free metal (which makes it easier to form the cation) and the high solvation energy of their cations (which indicates that the cation is …