Q. If the electronic configuration of an element is 2, 8, 2, to which period of the Modern Periodic Table does it belong ?
✅ Correct Answer: (D)
3
Explanation: Element with electronic configuration 2,8,2 belongs to 3rd period and 2nd group. The valence electrons give us the idea of group number. As the electrons are divided into 3 different shell therefore period number is 3
Explanation by: Tina Singh
Element with electronic configuration 2,8,2 belongs to 3rd period and 2nd group. The valence electrons give us the idea of group number. As the electrons are divided into 3 different shell therefore period number is 3