Electronegativity Trend
Electronegativity generally increases from left to right across a period and decreases down a group. Fluorine is the most electronegative element.
Periodic Trend
Highest Values
F - Fluorine 3.98
O - Oxygen 3.44
Cl - Chlorine 3.16
N - Nitrogen 3.04
Br - Bromine 2.96
Lowest Values
Fr - Francium 0.70
Cs - Cesium 0.79
Rb - Rubidium 0.82
K - Potassium 0.82
Ba - Barium 0.89