Answer:
Electronegativity is a measure of the ability of an atom to attract electrons towards itself when it is bonded with another atom. It is a property of an atom that describes how strongly it pulls electrons towards its nucleus. The electronegativity of an atom determines the polarity of a bond between two atoms. The more electronegative an atom is, the more it attracts electrons towards itself, resulting in a polar covalent bond.
Electronegativity is measured on the Pauling scale, which assigns a value between 0 and 4 to each element. Fluorine, the most electronegative element, has a value of 4.0, while cesium, the least electronegative element, has a value of 0.7.