Electronic Configuration — Mains Questions

Discuss the fundamental principles governing electronic configuration. Explain why transition metals often exhibit variable oxidation states and magnetic properties, linking these to their electronic configurations.

Elaborate on the exceptions to the Aufbau principle, providing detailed scientific reasoning for Chromium and Copper. How do these exceptions influence their chemical behavior?

Analyze the relationship between electronic configuration and the periodic properties of elements. Illustrate with examples of atomic radius and ionization energy.