Among the halogens the rare element is: a. Fluorine b. Chlorine c. Astatine d. Iodine
Among the halogens the rare element is: a. Fluorine b. Chlorine c. Astatine d. Iodine
Explanation
Astatine is considered the rarest naturally occurring element on Earth, making it the "rare halogen" among the group which includes fluorine, chlorine, bromine, and iodine.