alkali metal


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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 ?
A Alkali metal B Noble gas C Base metal D Lanthanide 13.
According to industry publication, Mining Global, lithium is the lightest and least alkali metal and is used in dryers, air conditioners, medicines and electric car batteries like those used in Tesla (TSLA) models.
2 and 10 phr of an acetylacetonate of an alkali metal or alkaline earth metal, chosen in particular from the group consisting of Li, Na, K, Mg, Ca and the mixtures of such metals.
Contract Awarded for Alkali metal removal device for electrolytic molten aluminum 3 set; Enclosed chute system with static flow of 45t/h 1 set; Aluminum-titanium-boron double-coil variable-speed thread feeding machine 1 set; Double-rotor on-line degassing device 1 set; Casting tooling, Including dummy bar head 1 set for each specification; Vertical internal oil-gas valve casting machine 1 set; Casting control system and electrical equipment 1 set.
The next eight chapters provide a systematic summary of the best-known receptors for alkali metal cations, organic and inorganic anions, carbohydrates, nucleosides and nucleotides, oligonucleotides and nucleic acids, amino acids and peptides, protein surfaces and polar lipids.
The enhancement of O2-binding and catalytic oxidation activities by the oxa aza crown ether ring of the cobalt complexes as well as the complexed alkali metal and alkaline-earth metal ions were discussed.
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.
Abstract: Excess molar volume V E , energy of activation 6E , Gibbs energy change 6G and entropy change6S have been investigated for this study density and viscosity measurements of Acetonitrile (AN), 3-hydroxypropionitrile(3-HPN) and 50% mixture of AN + 3-HPN and alkali metal bromides (Li,Na,K,Rb and Cs)Br in AN, 3-HPN and50%AN+3-HPN over the concentration range (0.
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.