单选题: Which of the following traits characterizes the alkali metals? 选项: A. formation of dianions B. the smallest atomic radius in a period C. existence as diatomic molecules D. very high melting point E. the lowest F. irst ionization energies in a period 相关知识点: ...
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Group 1 elements are called alkali metals which are extremely reactive elements because they react with water to form molecular hydrogen and the...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a questi...
How many covalent bonds are normally formed by F? Identify the elements below as metals or non-metals. Calcium, silver. Determine the bonding type between the following types of atoms: a) Al-Ni b) Si-Ge c) C-O d) Fe-O e) Ne-Ar. Which one between ...
Method of preparation of solutions of the organic salts of alkali metals whichVESTERMAN ANATOLEVESTERMAN ANATOLE
百度试题 结果1 题目 Which is of the lowest first ionization energy in the following the alkali metals ( ). A. Na B. Rb C. Cs D. K 相关知识点: 试题来源: 解析 C 反馈 收藏
Group 2A —The Alkaline Earth Metals. Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A. ...
elements of temperature fuses) - Glass, and the pigments as well as dyes of glass paints (paints for glass and the pigments as well as dyes used for glass) - CdS-photocells and the phosphors contained in fluorescent display devices - Resistor elements (glass frit) - Impurities in metals ...
In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li). In fact, for the alkali metals (the elements in Group 1), the
Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to immobile compounds which can be used to provide positi