Inorganic Chemistry According to the Periodic Law

General Books publication date: 2009 Original publication date: 1898 Original Publisher: The Chemical publishing co. Subjects: Chemistry, Inorganic Science / Chemistry / General Science / Chemistry / Inorganic Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: PART V OXIDS AND SULPHIDS Binary Compounds of the Elements of Group VI and their Derivatives 249. Nature of the Oxids. -- Under this heading will be considered the binary compounds of oxygen and sulphur with the more positive elements and the derivatives of these compounds. The compounds of selenium and tellurium have been little studied but seem to resemble the compounds of sulphur. The members of the positive series of this group form no binary compounds with the positive elements, but do give them with the negative elements. Oxygen forms compounds, called oxids, with all the elements except fluorin, though the oxids of bromin have not been obtained in a pure state. With a number of the elements, oxygen forms more than one oxid. In Part III we have seen that hydrogen combines most readily with the more negative elements and has little tendency to combine with the more positive elements. With oxygen, as with the halogens, the gradation of affinity is in the opposite direction, the most positive elements having the greatest affinity for oxygen and holding it most firmly. The affinity of oxygen for the more negative elements seems to be stronger than that of the halogens. The oxids of the positive elements are insoluble in water, except those of the alkalies. The negative oxids are generally quite soluble in water. Closely related to the oxids is a class of compounds containing both oxygen and hydrogen, called hydroxids. 250. flethods of Formation. -- Oxids...