alkali metal

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any chemical element marked by luster, malleability, ductility, and conductivity of electricity and heat, and which will ionize positively in solution. adj., adj metal´lic.
alkali metal one of a group of monovalent elements including lithium, sodium, potassium, rubidium, and cesium.
metal fume fever an occupational disorder with malaria-like symptoms occurring in those engaged in welding and other metallic operations and due to the volatilized metals. It includes brassfounder's fever (brass chill, brazier's chill) and spelter's fever (zinc chill, zinc fume fever).
heavy metal one with a high specific gravity, usually defined to be above 5.0.
heavy metal poisoning poisoning with any of the heavy metals, particularly antimony, arsenic, cadmium, lead, mercury, thallium, or zinc.
noble metal a metal that is highly resistant to oxidation and corrosion.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

al·ka·li met·al

an alkali of the family Li, Na, K, Rb, Cs, and Fr, all of which have highly ionized hydroxides.
Synonym(s): alkali (3)
Farlex Partner Medical Dictionary © Farlex 2012

al·ka·li met·al

(al'kă-lī met'ăl)
An alkali of the family Li, Na, K, Rb, Cs, and Fr, all of which have highly ionized hydroxides.
Synonym(s): alkali (3) .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

al·ka·li met·al

(al'kă-lī met'ăl)
An alkali of the families Li, Na, K, Rb, Cs, and Fr, all of which have highly ionized hydroxides.
Synonym(s): alkali (3) .
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The absorbed S[O.sub.2] molecule could interact with alkali metal@COF-105 by the dominant donor-acceptor delocalization between 1-center lone pair of atom O7 and 1-center non-Lewis lone pair of alkali metal atom.
"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.
Certain salts of alkali metals have been used as infusions to combat human cancer.
In fact, electrons passing through thin alkali metallic foils do show this discreteness in energy loss, allowing determination of effective plasma frequencies in alkali metals. On the assumption that the observed transition is a manifestation of the plasma frequency, we can calculate the effective number of free electrons per atom in each case.
The remaining stockpile of 57 tonnes of NaK coolant comprises a volatile alloy of two alkali metals which would burst into flames upon exposure to the atmosphere.
Concentration range for alkali metals in soils of Keoladeo National Park The range is presented excluding the concentration in the litter layers Metals and/ Range Metals and/ Range or ratios (mg/kg) or ratios (mg/kg) Na 40.0-4533.0 pK 0.685-6.703 K 77.0-705.0 pCa 11.034-79.614 Ca 548.0-5651.67 pLi 0.097-0.373 Li 1.74-7.0 pMg 11.744-71.265 Mg 230.26-5653.95 rNa 0.01-2.271 Na/K 0.093-58.87 rK 0.007-0.072 Mg/Ca 0.089-1.681 rCa 0.124-3.905 SAR 0.021-4.707 rLi 0.001-0.004 pNa 0.954-69.431 rMg 0.133-2.48
The highly reactive alkali metal combines easily with other elements to form compounds.
Alkali metals might be extracted from the solid sample either by partial dissolution of the sample, and/or by selective leaching from the material.
Louis, MO-based life science and high technology company Sigma-Aldrich and New York, NY-based early advanced materials company SiGNa Chemistry recently announced that Sigma-Aldrich will distribute SiGNa's new technology for the controlled use of alkali metals, which has applications in such areas as hydrogen energy production for micro fuel cells.
Only hot amines and molten alkali metals affect the copolymer, and there is no known solvent for Halar under 250[degrees]F.
Alkali metals and chlorine present in fuels favor the formation of ash deposits and intensify the high-temperature corrosion and wear of boiler heat-transfer surfaces.