Divalent atoms, as, for example, that of Oxygen, can unite with one other atom of similar valencyor with two monovalent atoms.
Care is necessary to expose the cakes evenly to the action of the air.
Calcium chloride has sometimes been added to the limes: this reacts with the soda from the sulphide, yielding salt and probably precipitating lime, and has its own lyotrope influence, thus reducing the plumping effect possibly in two ways.
If for straight grains they are printed with a straight-grain roller, or grained neck to butt.
The leather is held by the operator, and the machine "head" pulls a fold of the leather over the blade.
The essential requirements are that a smooth plain finish should be given, and the leather must not stretch or be greasy.
In chrome tannage the lyotrope influence is much more prominent than in vegetable tannage, but the effect is in the same sense, viz.
Sometimes puering is omitted and the desired result obtained by washing in warm water, nearly deliming with warm solutions of organic acid, washing again and drenching.
If this were otherwise, the valency rule would hardly operate so well in endosmosis, kataphoresis, and precipitation.
In the preceding pages emphasis has been laid upon the importance of the adsorption law, the lyotrope series, and the valency rule.
In such a sol, also, thevalency rule indicates that the multivalent kations, e.
The operation of thevalency rule is the most complex of these factors, for there is also to be considered the stabilizing effect of the kations, especially of the trivalent kation Cr+++ from the unhydrolyzed chromium sulphate.
As ions possess different electric charges, the charge on the disperse phase is subject to the valency rule.
We might call the ratio of the number of links in the atom of any element, to the number in the atom of Hydrogen, the Valency of the element.
This forms the substance of the conception of the valency or atomicity of the elements.
Hence the power of the elements to change their atomicity is an essential part of their nature, and therefore constant valency cannot he considered as a fundamental property.
Hence it is possible to determine the valency by the specific heats of the metals.
As hydrogen is generally taken as the standard, in practice the valency of an atom is the number of hydrogen atoms it will combine with or replace.
Footnote 19: The valencyor atomicity of an element may be defined as the power it possesses of entering into compounds in a certain fixed proportion.
Even though it may presently be torn down, it is for the time being a completed structure; and a consideration of the valency of its atoms gives the best clew that has hitherto been obtainable as to the character of its architecture.
Just why different elements should differ thus in valency no one as yet knows; it is an empirical fact that they do.
The phenomena of valency find their explanation in modern views concerning the constitution of atoms (see Sec.
The number above each column indicates the valency which the elements of each group exhibit towards oxygen.
Frankland's theory of the valency of elementary atoms, and by Kolbe's speculation on the constitution of organic compounds.
In the next essay, on binary combinations and the theory of polyatomic radicals, he put forward the conception of mixed types, and first reached the knowledge of various atomicity or valency of the radicals.
But the desolation, if that is not too stern a word to use, only applies to the coast; the Valency Valley is verdant and beautiful.
It is the river Valency of which he speaks, the more important of the streams that join just above the haven.
The toxic and antitoxic effects of ions as a function of their valency and possibly their electrical discharge.
Micheels (1906) approached the matter from a totally different standpoint, seeking to discover what influence the valency of a metal has upon the toxicity of its salts.
He next considered the possibility of assigning a fixed limit to this valency or adicity of an atom, and concluded that the adicity was not absolutely fixed, but was fixed in relation to certain elements, e.
The question next arises, is the valency of an element fixed or variable?
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "valency" in a variety of sentences. We hope that you will now be able to make sentences using this word.
