Elements potassium-zinc comparison

Chemistry of the Vanous Oxidation States of I ransition Metals S8U The Chemistry of Elements Potassium-Zinc Comparison by Electron Configuration 582... 

The Chemistry of Elements Potassium—Zinc Comparison by Electron Configuration... 

Jones and Isaac 16 ) compared atomic absorption spectroscopy and spark emission spectroscopy for the determination of several elements in plant tissue. By comparing results statistically using a t-test, no significant differences were found for calcium, manganese, iron, copper, zinc, and aluminium, but significant differences were found for potassium and magnesium at the 0.01 % level. Breck162) made a similar comparison study for 15 elements. 

Gallium, Mendeleev s eka-aluminum, was discovered by Paul Emile Lecoq de Boisbaudran in 1875,5 years after the Russian chemist left a blank in his table for it and predicted a number of its properties. De Boisbaudran identified the element in a sample of zinc ore by using the still-new field of spectroscopy that Bunsen and Kirchhoff had employed to detect the fingerprints of elements such as cesium and rubidium (see p. 325). Within a month he had completed a series of conversions ending in the electrolysis of an aqueous solution of the hydroxide and potash (potassium carbonate). He isolated enough of the easily liquefied metal (mp = 29.78° C) to measure its properties and even present some to the French Academy of Sciences. A comparison of the properties of gallium and those predicted for eka-aluminum is given in Table 14.1. 

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