Question

astatine (at), iodine (i), chlorine (cl), bromine (br). which of the following halogens has the greatest electronegativity?

Explanation:

Step1: Recall electronegativity trend

Electronegativity decreases down a group in the periodic table. Halogens are in group 17.

Step2: Identify position of elements

Chlorine (Cl) is above bromine (Br), iodine (I), and astatine (At) in the halogen - group.

Answer:

Chlorine (Cl)