题目Most of the elements in the periodic table are___. A. metals B. non-metals C. metalloids D. noble gases 相关知识点: 试题来源: 解析 A。元素周期表中的大多数元素是金属。虽然有非金属、类金属和稀有气体,但金属的数量相对较多。反馈 收藏...
Metals make up most of the elements on the periodic table and are located to the left of the metalloids and non-metals. In general, metals are good conductors of both heat and electricity and they can be mixed together to form alloys with properties that are different from the metals they...
Within the periodic table loom many potential hazardous elements. Some elements are dangerous due to their toxicity. Others are dangerous because of how they respond, react, or even explode in the outside environment. And perhaps the most threatening elements are those that silently emit energy. ...
B Anyone who has ever taken chemistry has studied the periodic table (元素周期表). Most people who have memorized the elements in the periodic table have probably not given any thought to who created it. In 1869, Dmitri Mendeleev published the very first periodic table. Although there were a...
Silicon is one of the most studied elements in the periodic table. 硅是元素周期表中被研究最多的元素之一。 单个的过去分词作定语,通常是前置的。而且这里studied相当于一个形容词,被最高级修饰,所以是前置的。 祝同学学习进步~ 版权申明:知识和讨论来自课程:《英语零基础直达大学六级【3年随心畅学班】》的...
Which element is likely to be the most reactive metal in the periodic table? A. Hydrogen. B. Oxygen. C. Sodium. D. Gold. 相关知识点: 试题来源: 解析 C。在元素周期表中,钠是一种活泼的金属。氢不是金属;氧是非金属;金不活泼。反馈 收藏 ...
Graphene : carbon in Carbon is one of the most intriguing elements in the Periodic Table .Katsnelson, Mikhail I
Which element is the most reactive among Li, Na, and K?Which of the elements in the following periodic table are halogens?What is the first element on the periodic table? Hint: It has one electron!What element is in period 4 and group 14 (4A) in the periodic table?
【题目】Most of us hav e hear d about th e periodic table of elements (元素周期表). W e know elements ar e all aroun d us. Oxygen (氧) is on e of the most common elements foun d on th e Earth. It is very important for us becaus e w e breath e in it all th e time....
a5. when the periodic table was first introduced in 1869-70 by the German chemist Lothar Meyer and (independedtly) the Russian Dmitri Mendeleyev, one third of the naturally occurring chemical elements had not yet been discovered, and both chemists were farsighted enough to leave gaps where the...