Question

which of these elements has the lowest electronegativity values?
cesium
lithium
calcium
fluorine

Explanation:

Electronegativity increases across a period and decreases down a group in the periodic table. Cesium is in Group 1 and lower - down compared to lithium. Calcium is in Group 2. Fluorine is the most electronegative element. Cesium has a large atomic size and low effective nuclear charge, resulting in low electronegativity.

Answer:

cesium