Find out total number of representative elements in the given elements : Cd, Nb, Ta, Te, Ra, Mo, Po, — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Step 1: Lawrencium (Lr, Z=103) is the final element in the actinide series located in the f-block of the 7th period. Step 2: Being the last actinide, its 5f subshell is fully filled with 14 electrons. Step 3: After filling the 5f subshell, the next incoming electron enters the 6d orbital. Thus, the correct outer electronic configuration of Lawrencium is [Rn] 5f14 6d1 7s2.