百度试题 结果1 题目Which element is a noble gas? A. Oxygen B. Nitrogen C. Helium D. Chlorine 相关知识点: 试题来源: 解析 C。解析:氦(Helium)是稀有气体,也叫惰性气体。氧气(Oxygen)、氮气(Nitrogen)和氯气(Chlorine)都不是稀有气体。反馈 收藏 ...
What is the noble gas notation of sulfur (S)? Explain how to find the oxidation number of an element. What are the oxidation states of iron in Fe2O3? What is the number of neutrons in sulfur? What is the oxidation number of manganese in KMnO4?
Which is the electron configuration for boron?Electron Placement:Electrons fill the lowest energy electron shells and sublevels within those shells before they fill higher energy shells. This is called the Auf bau principle and it is vital to determining electron configuration....