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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
alkalický kov
alkalimetalli
References in periodicals archive ?
The previous project had been able to produce manganese sulfate with a purity exceeding 99.6% and low levels of base and alkali metals using material from Battery Hill property which comprises of rhodochrosite,0x20 a manganese carbonate mineral.
Besides, according to the research results on alkali metals poisoning resistance of these catalysts, it was discovered, the treated-catalyst poisoned by sodium salt had the best resistance performance, which might be related with the modification of the Non -thermal plasma, leading to more dispersed surface acid sites, to get more active sites, meanwhile, the toxicity of K was stronger than Na.
The team observed the atmospheric composition of the exoplanet and detected fingerprints signaling a high concentration of alkali metals, mainly sodium, potassium, and lithium.
Considering the excellent doping effect of alkali metals and transition metals into the covalent organic framework for hydrogen and carbon dioxide [17-23], we thus choose alkali (Li, Na, and K) and transition metals (Sc) doped into covalent organic frameworks and investigated properties of the metal-doped covalent organic frameworks and their interactions with the S[O.sub.2] gas molecule.
For those planets, it is suggested that things like clouds and alkali metals are the reason for the absorption of light, but those don't work for WASP-12b because it is so incredibly hot," explains Bell.
Dissolved chemical impurities: These impurities fall into two subcategories: alkali hearth metals and alkali metals that are tramp elements and in excess of the alloy compositional limits.
When Smartex which was launched at Wetex 15 in Dubai, is able to smartly extract families of ions in line with Mendeleev classification columns, such as Alkali metals (cations+) or Alkaline earth metals (cations++), Selectex takes the technology one step further, said the company in a statement.
Among the topics are alkali metals, the boron group--group 13, the carbon group, transition metals and d-block metal chemistry, radioactive compounds and their clinical application, and chelation therapy.
With snapshots from a high-speed camera, chemists can finally explain why sodium and other alkali metals blow up in water.
For synthesis of polycarbynes, studies on Wurtz coupling of sp3 coordinated bromoform initiated with alkali metals have been published, but these reactions are extremely exothermic and potentially violent.