Pauling Electronegativity Number
One of the familiar periodic trends usually described using the periodic table of elements is Paulingâ€™s Scale of Electronegativity, which is a measure of the capacity of an atom to attract a pair of bonding electrons. With Paulingâ€™s scale, Fluorine is the most electronegative element with a value of 4.0 while Caesium and Francium have the least electronegativity value of 0.7.
Generally, electronegativity increases from left to right in a period and decreases from top to bottom in group. This chemical property affects the types of chemical bonds atoms can have in the presence of another.