alkali metal


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Related to alkali metal: Transition metal

alkali metal

n.
Any of a group of soft, white, low-density, low-melting, highly reactive metallic elements, including lithium, sodium, potassium, rubidium, cesium, and francium.

alkali metal

n
(Elements & Compounds) any of the monovalent metals lithium, sodium, potassium, rubidium, caesium, and francium, belonging to group 1A of the periodic table. They are all very reactive and electropositive

al′kali met`al


n.
any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis.
[1880–85]

alkali metal

Any of a group of soft metals that form alkali solutions when they combine with water. They include lithium, sodium, potassium, rubidium, cesium, and francium. Except for cesium, which has a gold sheen, alkali metals are white. The alkali metals have one electron in their outer shell, and therefore react easily with other elements and are found in nature only in compounds. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alkali metal - any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)alkali metal - any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium); "the hydroxides of the alkali metals are strongly alkaline"
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
Translations
alkalický kov
alkalimetalli
References in periodicals archive ?
The composition comprises carbonate salts selected from alkali metal carbonates and bicarbonates, and wherein the total level of alkali metal bicarbonates is greater, in weight percentage terms, than the total level of alkali metal carbonates.
The groundbreaking aspects of this proposal are as follows: (1) development of a unique setup where electrical transport, angle-resolved photoemission (ARPES) and optical spectroscopy is measured in-situ on the same sample, (2) large-area deterministic layer-by-layer growth by chemical vapour deposition (CVD) and molecular beam epitaxy, (3) the effects of mechanical strain and hence large pseudomagnetic fields on the electronic band structure will be investigated using ARPES, (4) the effects of alkali metal doping on the superconducting transition temperature and the spectral function will be investigated using transport, ARPES and optical spectroscopies shining light onto the superconducting pairing mechanisms in different classes of materials.
Our expertise resides in Organometallic reactions including Grignard chemistry, alkali metal reactions, and other water/oxygen sensitive chemistries.
Key statement: This invention relates to a method for producing a modified conjugated diene rubber wherein the method involves: (a) a step in which a conjugated diene polymer having an alkali metal or alkaline earth metal active end and obtained by polymerizing a conjugated diene compound or by polymerizing a conjugated diene compound with an aromatic vinyl compound is reacted with a first alkoxysilane compound which has an alkoxysilyl group having two or more alkoxy groups and has a group protected by a protecting group wherein deprotection is possible to obtain a modified conjugated-diene polymer having an alkoxysilyl group; and (b) a step in which the modified conjugated-diene polymer is reacted with a second alkoxysilane compound which has an alkoxysilyl group.
He begins with the atomic properties of one-electron and two-electron atoms, then explains the atomic properties and periodic trends of atoms with more than two electrons, homonuclear diatomic molecules, gaseous alkali metal haloids with ionic bonds, other heteronuclear diatomic molecules with polar covalent bonds, the Lewis cubical atom model, molecular orbital calculations on heteronuclear diatomic molecules (as well as hybridization and estimation of net atomic charges from calculated electron densities), homonuclear diatomic species of certain second-period elements, structure and bonding (including in simple compounds of the Group 14 elements and those in other Groups), and electron deficient molecules.
Neutralization with amines, ammonia, or alkali metal hydroxides makes them dispersible in water.
Samples harvested in March were the least favourable for biofuel creation, as they contained the lowest proportion of carbohydrate and the highest ash and alkali metal content.
In our lab, we were able to produce alkali metal silicides, which basically are made from sodium and silicon, which, in turn, are produced from salt and sand," said James Dye, SiGNa's co-founder and University Distinguished Professor of Chemistry Emeritus at MSU.
Matsumoto and Odani have developed a dispersion technique based on intercalating alkali metal ions between layers of a lamellar crystalline polymer.
In one contribution, a Swedish physics professor reviews recent work on the structural properties and phase diagrams of complex alkali metal and alkaline earth hydrides under elevated pressures.
However, studies on the alkali metal status of Indian soils are extremely scarce, except for reports such as the one by Mehta et al.