Q1. What is the general electronic configuration of elements of the second transition series? Which d orbitals are filled up here?
- Second transition series includes elements from Y (Z=39) to Cd (Z=48).
- General electronic configuration is [Kr] 4d¹⁻¹⁰ 5s⁰⁻².
- The 4d orbitals are progressively filled in this series.
- The five d orbitals filled are dxy, dyz, dxz, dx²-y², and dz².
Answer: The elements of the second transition series, also known as the 4d series, extend from Yttrium (Y, Z=39) to Cadmium (Cd, Z=48). Their general electronic configuration involves the progressive filling of the 4d orbitals, along with the 5s orbitals. The typical general electronic configuration can be represented as [Kr] 4d¹⁻¹⁰ 5s⁰⁻². The 5s orbital is generally filled before the 4d orbital according to the Aufbau principle, but electrons are often removed from 5s first during ionisation due to its...