Home ยป If the two members of a Dobereiner triad are chlorine and iodine, the third member of this triad is Periodic Table MCQs If the two members of a Dobereiner triad are chlorine and iodine, the third member of this triad is April 16, 2022 2 Views Q. If the two members of a Dobereiner triad are chlorine and iodine, the third member of this triad is : A. Fluorine B. Bromine C. Sodium D. Calcium Answer: Bromine