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.
Obviously, the more layers of electrons you have, the more space they will take up-electrons repel each other. That means that the atoms are bound to get bigger as you go down the Group. Trends in Electronegativity Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.n other words, as you go down the Group, the elements become less electronegative. Trends in First Electron Affinity. Defining first electron affinity. The first electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions.