Ask a Teacher

Search



what is electronegativity scale ?
Electronegativity, symbol X, is a chemical property that describes the tendency of an atom or a functional group to attract electrons (or electron density) towards itself. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it.
               Electronegativity cannot be directly measured and must be calculated from other atomic or molecular properties.
            The most commonly used method of calculation is that originally proposed by Linus Pauling by the equation,

E(AB) = [E(AA).E(BB)]1/2 + 96.48 (XA -XB)2


comments powered by Disqus