Home ยป Which of the following is the valance shell for the elements of second period of the modern periodic table? Periodic Table MCQs Which of the following is the valance shell for the elements of second period of the modern periodic table? April 16, 2022 2 Views Q. Which of the following is the valance shell for the elements of second period of the modern periodic table? A. M shell B. K shell C. L shell D. N shell Answer: L shell