Home ยป The group number and period number respectively of an element with atomic number 8 is Periodic Table MCQs The group number and period number respectively of an element with atomic number 8 is April 16, 2022 9 Views Q. The group number and period number respectively of an element with atomic number 8 is. A. 6,2 B. 16,2 C. 6,8 D. 16,4 Answer: 6,2