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.
Best Answer: In general, the metals combine with nonmetals through ionic bonds. Nonmetals combine with other nonmetals by covalent bonds. A simple way to decide if a substance is covalent or ionic is to compare the electronegativities of the elements involved in the bonding.Electronegativity is a measure of the pull on shared electrons between to atoms. In NH3, the electronegativity of N is 3.04 and H is 2.20.If the difference in electronegativity is less than about 1.7, the bond is covalent. So NH3 is made of covalent bonds. But, the N has a stronger pull on the shared e-compared to the H, so the nitrogen is partially negative and the hydrogen is partially positive. simple way to decide if a substance is covalent or ionic is to compare the electronegativities of the elements involved in the bonding. Electronegativity is a measure of the pull on shared electrons between to atoms.