alkaline earth
碱土
常用释义
英式发音
美式发音
基本释义
- 碱土金属：周期表中第二组元素，包括铍、镁、钙、锶、钡和镭等具有二价强碱性的金属元素。
例句
-
1·The alkaline earth used therein is salt compound of magnesium and calcium.所采用的优选的碱土是镁和钙的盐和化合物。
-
2·The calculated results of energy gap on alkaline earth mixed halides are reasonable.对碱土金属复卤化物的能隙进行了计算，结果合理。
-
3·By two alkyl halide with alkali metal or alkaline earth metal polysulfides from condensation.由二卤代烷与碱金属或碱土金属的多硫化物缩聚而成。
-
4·The difference can be used to improve the separation between alkaline earth and transition metal ions.这种差异可用于改善碱土金属与过渡金属离子之间的分离状况。
-
5·Beryllium: chemical element, lightest of the alkaline earth metals, chemical symbol be, atomic number 4.铍：碱土金属中最轻的化学元素，化学符号Be，原子序数为4。
-
6·More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies.更广义的范围包括碱土金属。碱是强碱性的，会使红石蕊试纸变蓝色；
-
7·The latter which appeared in the tang dynasty is to decoct the brine extracted from the ash or alkaline earth in flat plates.“煎盐”则指提取柴灰或碱土中的卤水，用浅而阔的盘熬干以制取盐，这一专称唐代始见。
-
8·The oxidative dehydrogenation of ethane to ethylene was studied over alkaline earth oxides promoted with alkaline metal chlorides.报道了乙烷在以碱金属氯化物作为助剂的碱土金属氧化物催化剂上的氧化脱氢。
-
9·Because of high alkaline earth metal content, the reduction swelling of Baotou pellet makes blast furnace operation very difficult.包头白云鄂博矿碱金属含量高，球团还原膨胀率高，给高炉冶炼带来很大困难。
-
10·The development of solvent extraction separation of alkaline earth elements was reviewed, according to the classification of extractants.本文就碱土金属离子萃取分离的进展情况，按萃取剂的分类进行了综述。