The noble gases in the periodic table are known for being___. A. very reactive B. slightly reactive C. neutral D. extremely unreactive 相关知识点: 试题来源: 解析 D。稀有气体在元素周期表中以极不活泼著称。选项 A、B 都不符合稀有气体的特点;选项 C 中性不准确,稀有气体是极不活泼。反馈 收藏...
78.1. THE PERIODIC TABLE 元素周期表 (图片可点击放大) In this section, we will explore the periodic table, which organizes chemical elements and provides valuable information about their properties and relationships. Understanding the periodic...
接下来第七主族的元素,我们把它们叫做卤素〔halogen〕,他们非常活泼,具有极其强大的氧化性,所以很危险。 最后一竖列我们把他们叫做稀有气体〔noble gases〕,因为他们储量比较稀少,以前我们把叫做惰性气体,因为他们非常稳定,不和任何物质发生反应,直到二氟化氙的出现,推翻了这个名称,虽然他们当中出现了一些叛徒,但是氦元...
Periodic table showing each element's atomic number, symbol, and atomic weight. Encyclopædia Britannica, Inc. periodic system of elements with periods demarcated by noble gases Periodic system of elements with periods demarcated by noble gases. ...
periodic table of elements(元素周期表),简称periodic table(周期表)。 整个周期表根据元素价电子层排布方式被分为了五个大块的block(区): s-block,f-block,d-block,ds-block,p-block 这些区外,元素周期表还被人们划分为了更基本的“周期”与“族”。
1 Alkali and Alkalinse earth metals 2 Transition Metals More so than any of the other major groups of elements in the periodic table, the transition metals have shaped human history and have been the workhorses of industry. The disc...
the standard periodic table. Each group has a number: from 1 to18. Elements in a group have electrons arranged in similar ways, which givesthem similar chemical properties. For example, group 18 is known as the noblegases because they are all gases and they do not combine with other atoms...
1 :the periodic table are seperated into periods,there are 4 groups metals,non-metals,metalloids and noble gases. each group's elements all have atomic number which is the number of protons found in the nucleus of an atom.2: Plutonium is not formed by the death of a star in a super ...
two more elements, argon and helium. These unreactive gases did not fit into the Periodic Table. In short order, Ramsay also discovered three more unreactive gases. These gases represented a new family of elements that had to be inserted as an eighth main column in Mendeleev's table. ...
The noble gases are located in Group VIII of the periodic table. Helium and neon are examples ofnoble gases. These elements are used to make lighted signs, refrigerants, and lasers. The noble gases are not reactive. This is because they have little tendency to gain or lose electrons. ...