The mechanism of action of probiotics (e.g., having an impact on the intestinal microbiota or enhancing immune function) was dropped from the definition to encompass health effects due to novel mechanisms and to allow application of the term before the mechanism is confirmed.
Noun. 1. electronegativity - (chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond. negativity.
1 In general, electronegativities decrease down a Group of the Periodic Table. 2  In general, electronegativities increase going from left to right across a Period of the Periodic Table.ey Concepts. 1  In 1932 Linus Pauling defined electronegativity as the power of an atom in a molecule to attract electrons to itself. 2  Pauling devised a numerical electronegativity scale, based on bond energies. 3  In general, electronegativities decrease down a Group of the Periodic Table.