| 释义 |
alkali metal
alkali metaln. 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.Thesaurus| Noun | 1. |  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"alkaline metalmetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
Translationsalkali metal
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·alan 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) . alkali metal
Related to alkali metal: Transition metalSynonyms for alkali metalnoun any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)SynonymsRelated Words |