Home ยป An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom? Periodic Table MCQs An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom? April 14, 2022 12 Views Q. An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom? A. 1 B. 3 C. 6 D. 8 Answer: 1
