A. Neon B. Nickel C. Nitrogen D. Sodium 相关知识点: 试题来源: 解析 A。解析:Neon(氖)是一种惰性气体,符号为“Ne”。B选项Nickel(镍),符号为“Ni”;C选项Nitrogen(氮),符号为“N”;D选项Sodium(钠),符号为“Na”,所以答案为A。反馈 收藏 ...
This element is a noble gas. Where is it located in the periodic table? A. In group 18 B. In group 17 C. In group 16 D. In group 15 相关知识点: 试题来源: 解析 A。稀有气体在周期表中的第十八族。第十八族元素为稀有气体,化学性质非常稳定。
In excellent agreement, these approaches show Og to be a solid at ambient conditions with a melting point of ~325 K. In contrast, calculations in the nonrelativistic limit reveal a melting point for Og of 220 K, suggesting a gaseous state as expected for a typical noble gas element. ...
The electron configuration of a certain element is 1s² 2s² 2p⁴. Which of the following is correct about this element? A. It is a metal. B. It is a non-metal. C. It is a noble gas. D. It is a transition metal. 相关知识点: 试题来源: 解析 B。解析:该元素价电子数为...
Write the ground-state electron configuration of element W using the Noble gas shorthand. Which is the noble gas notation for chlorine? What are electron configurations and periodic properties? Which is the electron configuration for boron?
(e) which element will form an anion of valency 1? (f) Which element is a noble gas ? View Solution The electronic configuration of three elements X,Y and Z are given below: X2 Y2,6 Z2,8,2 (i) Which element belongs to second period? (ii) Which element belongs to se...
The one thing I know about electronegativity is that it is the opposite of electropositivity (which is the likelihood of an element to donate electrons, rather than gain electrons.) And the only reason I know about electropositivity, is because I recently read an article on how electropositiv...
Atoms are the fundamental unit of an element. They consist of a nucleus and surroundingelectrons. When an atom has an incomplete electron shell, it is said to have valence electrons. When two or more atoms come together to share outer shell valence electrons, a chemical (covalent) bond is ...
百度试题 结果1 题目Most stable electronic configuration is of a/an: A(A) Noble gas(B)Electronegative element (C) Alkali metal(D)Halogen 相关知识点: 试题来源: 解析 A 反馈 收藏
Why is oxygen the most abundant element compared to the others? Consider the substance: helium gas. Classify this substance as a pure substance or a mixture. Explain or prove your answer. Give three reasons why carbon is preferred over hydrogen in the relative atomic mass of an atom. ...