Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

Spectral tunability, to allow control over the direction of energy flow among constituent quantum dots in a single complex. Ideally, the tunability is realized based on systematically varying a single ...

Some elements, particularly the transition metals, do not always have the same valency in their different compounds. The valency of these elements is usually given in roman numerals inside brackets.

American Journal of Botany, Vol. 8, No. 9 (Nov., 1921), pp. 464-470 (7 pages) 1. Chromium has a different initial effect upon the permeability of Laminaria depending upon whether it occurs in the ...