Alkaline earth metals calcium

The true alkaline earth metals—calcium, strontium, and barium—are obtained either by electrolysis or by reduction with aluminum in a version of the thermite process (see Fig. 6.8) ... 

Alkali and alkaline-earth metals Calcium, potassium, sodium, lithium... 

The potassium salt is the most soluble, whilst the caesium salt is quite insoluble in water. Both the rubidium and the caesium salts may be prepared by double decomposition of dilute solutions of their chlorides with the nitroso salts of sodium or potassium. The thallium salt may be prepared in a similar manner by means of thallium sulphate. The nitroso salts of the alkaline earth metals—calcium, barium, and magnesium—are very soluble in water. 

Ceo has also been doped with the alkaline earth metals calcium, strontium, and barium (Group 2)P Two discrete phases have been characterized CasCeo is simple cubic with the same cell parameters as pure Ceo, and BaeCeo is bcc. These compounds are reported to have superconducting transition temperatures (Tc) of 8.4 and 7 K, respectively. ... 

Element number 17 is the halogen, chlorine. Since it is a noimetal, chlorine will form the molecular compound HCl. Element 20 is the alkaline earth metal calcium which will form an ionic hydride, CaH2. 

A very strong reducing agent and the presence of suitable dopant counterions are needed to introduce divalent cations into polyacetylene. Such a strong reducing solution can be made by dissolving the alkaline earth metals, calcium, strontium or barium in liquid ammonia (equation 1). 

Mantell, C.L. (1973) The alkaline earth metals calcium, barium, and strontium. In HAMPEL, C.A. (ed.) Rare Metals Handbook, 2nd ed. Reinhold, New York, pp. 15-25. 

Metallic solutes fall into two classes. The first is represented by the alkaline earth metals calcium, strontium, and barium these metals dissolve as monomeric species, and their solubility in the liquid alkali metals increases with atomic weight. The chemical reactivity of these metals is not inhibited by solution in the liquid metal, and a solution of barium in sodium, for example, behaves as though sodium were no more than an inert diluent for the barium. From the chemical point of view, it is convenient to regard the valence electrons in the liquid alkali metal medium as being free from the atoms and existing in a conduction band in the liquid medium. Liquid sodium, for instance, is then treated as an assembly of Na" " ions in a sea of free electrons. Solutions of the alkaline earth metals are then regarded as containing units, with two electfons from... 

Liquid ammonia has certain solvent properties like those of water however, liquid ammonia will dissolve the alkali metals (sodium, potassium, etc.) and the heavier alkaline earth metals (calcium, strontium, barium) to give intensely blue, conducting solutions. The sodium solution is widely used as a reducing agent in organic syntheses. The unbalanced equation is presented in textbooks as follows ... 

The designahon rare is rather inappropriate. The RE metals are rare compared to the alkaline earth metals, calcium, magnesium and so on, but are not especially rare in general. Cerium, the RE metal with the highest mean content in earth crust is more common than copper. Thulium, the rarest RE metal (with the exception of promethium) is more common in the earth s crust than is silver. 

This reaction also occurs with the alkaline earth metals calcium and magnesium, although it is considerably less violent. 

Alkaline earth metals calcium and barium Halogens fluorine and iodine Noble gases argon None of these B, Sn, and V... 

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