Home » 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 31 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. 1B. 3C. 6D. 8Answer: 1
