Question

10 what halogen is the most reactive (electronegative) element on the periodic table and used in toothpaste? a f b br c cl d i

Explanation:

Halogens include F (Fluorine), Br (Bromine), Cl (Chlorine), I (Iodine). Fluorine (F) is the most electronegative (most reactive among halogens) and is used in toothpaste (e.g., in fluoride compounds for dental health). Bromine, Chlorine, and Iodine don't match both criteria as well as Fluorine.

Answer:

A. F