alkali metal

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Related to Alkali metals: Halogens

metal

 [met´'l]
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.

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)

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) .

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) .

metal

any chemical element marked by luster, malleability, ductility and conductivity of electricity and heat, and which will ionize positively in solution.

alkali metal
one of a group of monovalent elements including lithium, sodium, potassium, rubidium and cesium.
metal detector
a portable electronic device used to detect metal in the reticulum of cows. Most clinically normal cows fed on prepared rations give positive results.
metal implants
see implant.
metal retriever
a long, probang-like instrument, passed orally into the reticulum in cattle for the retrieval of metallic foreign bodies that might cause traumatic reticuloperitonitis.
References in periodicals archive ?
Therefore, systems selected her ein, a-H on benzenoid rings substituted by alkali metals with more feasibility of losing electron atoms which can gain more stronger nonlinear optical response in a- M@n-acenes (M = Li, Na and K) salts (n = 1, 2 and 3) system.
Results from micas leaching (Cs-TFA, BIO, MUS, and ILL) showed that alkali metals but also Si, Al and/or Fe dissolve least from all tested 12 samples (Table 3).
Encapsulating alkali metals into silica gel enables scientists who have traditionally shied away from these metals to now safely and routinely perform reductions," said Sigma-Aldrich director of business development for chemistry Chris Hewitt.
For instance, it was established that the intensity of alkali metals volatilization in the carbon monoxide environment is about fifty times higher than in the air.
Inorganic Specialties includes the Evans City, Pennsylvania USA production site and the Specialty Alcoholates, Boranes and Alkali Metals product lines which are produced at the site.
Current methods to dissolve carbon nanotubes, which include surrounding the tubes with soap-like surfactants, doping them with alkali metals or attaching small chemical groups to the sidewalls, disperse nanotubes at relatively low concentrations.
According to SiGNa Chem, the company's core technology is nanoencapsulation of alkali metals into porous oxides.
It is proposed that the relative stability of these different types of complexes varies with the size of the cation, for the lighter alkali metals the [pi]-type complex being more favoured.
The new observation that sodium can melt at just above room temperature, 27[degrees]C, confirms a growing suspicion among scientists that alkali metals are more complicated than they previously thought.
The open university videos such as The Elements Organized and the more specialized Anions of the Alkali Metals show the tremendous possibilities of visual aids to chemistry teaching.
The Dual View configuration should provide the desired extra sensitivity of the axial viewing (for trace analysis) while providing the linearity which should be included in the Radial mode of operation (for high concentrations and alkali metals analysis).