Chlorine or iodine, eg (7)
I believe the answer is:
halogen
(Other definitions for halogen that I've seen before include "reactive group member" , "Element such as iodine" , "I too maybe" , "Element like, eg, fluorine" , "iodine, perhaps" .)
I believe the answer is:
halogen
(Other definitions for halogen that I've seen before include "reactive group member" , "Element such as iodine" , "I too maybe" , "Element like, eg, fluorine" , "iodine, perhaps" .)