Question

What do you understand by electro negativity?

Answer 1

Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract electrons (or electron density) towards itself.[1] 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.

Answer 2

the effect of positive charge is prevailing more or less outside the orbital area of the atom that is beyond the area after the valence orbital.hence. the attraction forces of the nucleus of the atom affects the bond between the atoms joined by covalent bond.this attraction forces is called electronegativity.the absolute value of electronegativity cannot be measured.the value of electronegativity of lithium is accepted as unity, the relative values of electronegativities of other elements are determined.the electronegativity of F ( fluorine) is four times that of lithium and so electronegativity of F is 4.0, which has the highest value of electronegativity amongst all the elements.as we move from left to right in the periodic table, electronegativity increases and as we go down in the group the value of electronegativity decreases

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