Electronegativity is the property of an element to attract the electrons towards itself. It ranges from 0.70 to 3.98. The most electronegative atom is fluorine and the least electronegativity atom is francium. Electronegativity predicts whether the bond will be ionic or covalent. Further, it also tells about the polarity of the bond and the elements from atomic number 1 to 127 are included in electronegativity chart.