[答案]B [解析]语法题。根据句子结构,可知句子的主语为Fluorine,谓语部分为is a greenish-yellow gas,后面是由that引导的定语从句,所以空格中为同位语,对主语起补充说明作用,应选用名词短语充当同位语。句意:氟,一种化学元素,是一种黄绿色的有毒且具有高度腐蚀性的气体。选项B符合题意。反馈...
Is fluorine gas really yellow?Moissan's observation, that fluorine gas is yellow, has been confirmed.doi:10.1016/S0022-1139(00)85188-XJ. BurdonB. EmsonA. J. EdwardsElsevier B.V.Journal of Fluorine Chemistry
百度试题 结果1 题目The element fluorine is a___. A. metal B. non-metal C. metalloid D. noble gas 相关知识点: 试题来源: 解析 B。氟是一种非金属元素。氟具有非金属的特性,不是金属、类金属或稀有气体。反馈 收藏
What is the formula for fluorine gas?Gases:Gases can be elements or compounds. The elements that are gases at room temperature are hydrogen, nitrogen, oxygen, fluorine, chlorine and all of the noble gases. Fluorine is also the most reactive nonmetal....
Fluorine is a greenish gas too active that even water and glass burn in it. 相关知识点: 试题来源: 解析 B 答案:B:so分析:【so + adj. that+ 从句】固定句型。参考译文:氟是一种浅绿色气体,特别活泼,甚至水和玻璃都可以在里面燃烧。反馈 收藏 ...
Hydrogen chloride molecules have weak intermolecular forces, which are easily overcome by the motion of the molecules at room temperature. Thus, there... See full answer below.Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts ...
Regeneration of the filament is also possible with fluorine, but its chemical reactivity is so great that other parts of the lamp are attacked.[6][7] It is possible to see a live demonstration of the Tungsten-Halogen cycle in this accelerated video.[8] The lamp is equipped with an open ...
题目是when fluorine gas is put into contact with calcium metal at high temperatures,calcium fluoride powder is created in an exothermic reaction 答案 Fe2O3+3CO=高温=2Fe+3CO2 HCl+NaOH==NaCl+H2O 相关推荐 1 生产铁和氯化钠的化学方程式是什么? 题目是when fluorine gas is put into contact with...
a常温固化氟碳树脂面漆,是目前新一代高性能防腐面漆具有极为优良的耐热、耐化学和耐候性能,誉为目前世界上耐候性最优秀的材料。 The normal temperature solidification fluorine carbon resin finish coat, is the present new generation of high performance anticorrosion finish coat has extremely fine heat-resisting...
Why is fluorine a gas at room temperature? At room temperature the chemical bromine is in which state? What is promethium's boiling point? What temperature scale has zero as its lowest temperature? How many neutrons does xenon have? Which two elements are liquids at room temperature? How man...