Alkali metals elements

Krebs, Robert E. The history and use of our earth s chemical elements a reference guide. Westport (CT) Greenwood P, 1998. ix, 346p. ISBN 0-313-30123-9 A short history of chemistry — Atomic structure The periodic table of the chemical elements — Alkali metals and alkali earth metals - Transition elements metals to nonmetals — Metallics and metalloids - Metalloids and nonmetals — Halogens and noble gases - Lanthanide series (rare-earth elements) — Actinide, transuranic, and transactinide series... 

A number of useful properties of the Group 1 elements (alkali metals) are given in Table 8. They include ionization potentials and electron affinities Pauling, Allred-Rochow and Allen electronegativities ionic, covalent and van der Waals radii v steric parameters and polarizabilities. It should be noted that the ionic radii, ri, are a linear function of the molar volumes, Vm, and the a values. If they are used as parameters, they cannot distinguish between polarizability and ionic size. 

III. REACTIONS OF GERMANIUM AND TIN DERIVATIVES CONTAINING THE ELEMENT-ALKALI METAL BOND... 

Table Group-1 Elements Alkali Metals Increasing Decreasing Exceptions Trends Trends...

Synthesis of cyantrimethylsilylamides from elemental alkali metals. In a typical experiment 0.5 g alkali metal was cut into small pieces and mixed with an excess, e.g. lOmL, BTSC. The reaction mixture became cloudy after a few minutes to several hours, depending on the alkali metal and the temperature (20 - 135 °C). The reaction was stopped after 5 h to 3 d. Products consisted of fine white powders which were washed several times with n-hexane and dried at 50 - 150°C / 10 mbar. The lithium and sodium compound were recrystallized from THF and hot pyridine, respectively. 

Synthesis of cyantrimethylsilylamides from elemental alkali metal naphthalenides. Small pieces of lithium or sodium were added to a stirred solution of 5 g naphthalene in 120 mL THF, generating a dark green suspension. This alkali metal naphthalenide reagent was slowly added to a stirred mkture of 10 mL BTSC and 10 mL n-hexane at -40 °C. Isolation and purification were performed as described above after complete separation of the naphthalene. 

When we compare the Group lA elements (alkali metals) and the Group IB elements (copper, silver, and gold), we arrive at an interesting conclusion. Although the metals in these two groups have similar outer electron configurations, with one electron in the outermost s orbital, their chemical properties are quite different. 

Group lA and 2A Elements Alkali Metals and Alkaline Earths... 

GROUP lA AND 2A ELEMENTS ALKALI METALS AND ALKALINE EARTHS 3... 

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