Which pair has both members from the same period of Periodic Table? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

The electronic configuration of Sodium (Na) and Chlorine (Cl) is 2 2 6 1 Na - 1s 2s 2p 3s It position in the third period and IA group 2 2 6 2 5 Cl - 1s 2s 2p 3s 3p It position in the third period and VIIA group Therefore, the correct option is d.