Question

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

Explanation:

Step1: Recall electronegativity trend

Electronegativity increases across a period and decreases down a group in the periodic table. Halogens are in Group 17.

Step2: Determine positions of halogens

Among Iodine (I), Astatine (At), Bromine (Br), and Chlorine (Cl), Chlorine is the highest up in Group 17 (closer to the top of the group). As we move down Group 17 (from Cl to Br to I to At), electronegativity decreases. So Chlorine has the highest electronegativity among these.

Answer:

Chlorine (Cl)