Question

which atom is more electronegative?
options: cl, k, b, rb

Explanation:

Electronegativity generally increases across a period and decreases down a group in the periodic table. Chlorine (Cl) is a non - metal in the halogen group, while K (Potassium), B (Boron), and Rb (Rubidium) are metals. Metals have lower electronegativity compared to non - metals in general, and among these, Cl is far more electronegative as it has a strong tendency to attract electrons.

Answer:

Cl (Chlorine)