What type of element is zirconium? In other words, what is it classified as on the periodic table? What is the name of the Group 1 elements in the periodic table? An element in the lower-left corner of the periodic table: a. is either a metal or metalloid. b. is either a metalloid...
What is the chemical symbol for oxygen?A) OB) OcC) OmD) Ox 相关知识点: 试题来源: 解析 A) O 题目询问氧气的化学符号。化学符号遵循国际通用规则,每个元素有唯一的符号。氧元素的符号为O,对应选项A。其他选项分析如下:- B) Oc:不存在该元素符号,可能为错误拼写。- C) Om:无此元素符号,类似错误。
解析 A核心短语/词汇:help sb./ sth. (to) do sth. 帮助某人/某物做某事句子译文:氧气是唯一的助燃气体吗? 本题考查定语从句。___helps fire burn 用来修饰之前的名词gas, 该从句的引导词在定语从句中做主语,不能省略,先行词有only 修饰时不能用which; what 不能引导定语从句,故选项A符合题意。反馈...
doi:10.1007/978-3-642-13179-0_1H. DeckerK. HoldeDecker, H. & Van Holde, K., E. 2011, "Oxygen, Its Nature And Chemistry: What Is So Special About This Element?" in Oxygen and the evolution of life, Springer, Berlin; Heidelberg; New York, pp. 1-18....
Does oxygen have a higher electronegativity than hydrogen? How to determine electronegativity from the periodic table What is the relationship between electronegativity and the polarity of a chemical bond? What determines an element's electronegativity?
What is the symbol for the element whose electron configuration ends with 4p6? What is the name of the element that has an atomic number of 35? An atom of an element has the following groundstate configuration: (Kr)4d^105s^25p^b. a. If the element is in Group 6A, what is the sy...
百度试题 结果1 题目() 5. What is the chemical for oxygen? A. symbol B. stage C. step 相关知识点: 试题来源: 解析 A 反馈 收藏
Oxygen is a colorless, odorless, tasteless gaseous chemical element which appears in great abundance on Earth, trapped by the atmosphere. Many people are familiar with oxygen, because it is a vital component of the respiration process; without it, most organisms will die within minutes. A number...
百度试题 题目What is the atomic number of oxygen?A、2B、6C、8D、20Answer:C 科目四考试网___科目四考试题库相关知识点: 试题来源: 解析 http://www.km4ks.com/st/tk/ 反馈 收藏
Our understanding of what an element is has evolved over the years, but it’s still a tricky concept to nail down. Philip Ball investigates