| 词汇 | alkali-metal |
| 释义 | alkali metal noun[ C ] chemistry specializeduk /ˌæl.kəl.aɪ ˈmet.əl/ us /ˌæl.kəl.aɪ ˈmet̬.əl/ any of a group of soft, white metals that are chemical elements and react easily with other substances碱金属 Chemistry: types of chemical acid salt aerogel albumin alkaline alkalinity alkaloid antioxidant carbohydrate inorganic isopropanol ketone lectin melamine methyl orange monosaccharide mothball propellant saline soluble sulphide You can also find related words, phrases, and synonyms in the topics: Chemical elements alkali metal | American Dictionaryalkali metal noun[ C ] us/ˈæl·kəˌlɑɪ ˌmetə l/ chemistry any of a group of soft, white metals that are chemical elements and react easily with other substances Examples of alkali metalalkali metal These sources work by applying a layer of alkalimetal atoms on a low work function substrate, usually tungsten. The technique coats a tungsten plug with aluminosilicate doped with an alkalimetal, which is then sintered onto the tungsten. These alkalimetal heat pipes transferred heat from the heat source to a thermionic or thermoelectric converter to generate electricity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. From this acid other alkalimetal salts can be prepared. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Saltiness and sourness are perceived when alkalimetal or hydrogen ions enter taste buds, respectively. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As a hydride of an alkalimetal, it is reactive towards even weak oxidizing agents. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The alkalimetal peroxides and superoxides are powerful oxidizing agents. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This natural radioactivity became a basis for a mistaken claim of the discovery for element 87 (the next alkalimetal after caesium) in 1925. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Hence, the larger alkalimetal atoms (further down the group) will be less electronegative as the bonding pair is less strongly attracted towards them. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. All of the alkalimetal fluorides, and most of the alkali earth metal fluorides are true salts. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When alkalimetal cyanides are used, at least partial neutralization of the reaction medium is usually necessary to provide desired products. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The number of states of rare gas halides is greater than that of alkalimetal salts. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The radius increases sharply between the noble gas at the end of each period and the alkalimetal at the beginning of the next period. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The alkalimetal magnetometer is very expensive to use but it is very sensitive and has fast cycles when it is used. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Inducing n-type doping within the silicene structure requires an alkalimetal dopant. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of alkali metal These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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