Home ยป What is the atomic number of element of period 3 and group 17 of the Periodic Table? Periodic Table MCQs What is the atomic number of element of period 3 and group 17 of the Periodic Table? April 14, 2022 8 Views Q. What is the atomic number of element of period 3 and group 17 of the Periodic Table? A. 10 B. 4 C. 17 D. 21 Answer: 17
