V-G meter. See: direct-indicating viscometer.
VAC. Alternating current voltage.
Valence. A number representing the combining power of an atom, that is, the number of electrons lost, gained, or shared by an atom in a compound. It is also a measure of the number of hydrogen atoms with which an atom will combine or replace, for example, an oxygen atom combines with two hydrogens, hence has a valence of 2. Thus, there are mono-, di-, tri-, etc., valent ions.
Valence effect. In general, the higher the valence of an ion, the greater
the loss of stability to emulsions, colloidal suspensions, etc., these polyvalent ions will impart.
Wednesday, October 12, 2016
Monday, October 10, 2016
Wednesday, September 28, 2016
Subscribe to:
Posts (Atom)