百度试题 结果1 题目12 An element Z forms a chloride ZCl, which contains 65 5% of chlorine by mass What is the relative atomic mass of Z ?B A 27 B 56 C 52 D 96 相关知识点: 试题来源: 解析 B 反馈 收藏
Water chlorination is one of the most widely used safeguards for drinking water supplies. Chlorine may be added to water as a gas or in the form of hypochlorite compounds, which may be solid or solutions in water. Hypochlorites release small amounts of the element into the water. Very low...
Water chlorination is one of the most widely used safeguards for drinking water supplies. Chlorine may be added to water as a gas or in the form of hypochlorite compounds, which may be solid or solutions in water. Hypochlorites release small amounts of the element into the water. Very low...
What type of element is lead? In other words, what is it classified as on the periodic table? What element is the most reactive in the periodic table? Explain why. Which of the following groups of elements are likely to have substances that have both metallic and non-metallic properties?
What element from the first 10 elements would be most similar in properties to the element of atomic number 115 (presently unknown)? Identify the group in the periodic table in which the following element is found. Ar 4s1 Identify the group in the periodic table in which the following ...
What chemical element is Ge? Elements and Symbols: Chemical elements are substances made from a single type of atom. They are designated by a two-letter symbol in which the first letter is always capitalized while the second letter is lower-case. Often, the symbol is similar to the name, ...
What is silicon on the periodic table? Most elements on the periodic table are what? What is the chemical element radon? What is the chemical element neon? Which chemical element has the symbol Na? What is the chemical formula for the compound formed between calcium and chlorine?
of electrons it has, creating ions. For example, sodium (Na) is a highly reactive element. Na can form an ionic bond with chlorine (Cl) where the sodium loses an electron -- becoming Na+ -- and gives it to the chlorine atom -- which then becomes Cl- -- to form common table salt...
Notice that the general system for naming isotopes is the name of the element followed by a "-" followed by the mass number (=protons+neutrons) of that particular isotope, e.g. hydrogen-2. More Examples of Isotopes: There are two common isotopes of the elementchlorine. They are chlorine-...
The history of chromium element is not well understood due in part to the difficulty of isolating chromium from other similar metals. Chromium minerals were first recognized in 1761, but were seen as just another variety of lead until 1824 when French chemist Pierre-Jean Robiquet found that they...