Family
Transition metal
metals. Variable , colored compounds, many catalytic — the “middle” of the table.
Worth knowing
- Multiple stable (Fe²⁺ vs. Fe³⁺, Cu⁺ vs. Cu²⁺).
- Their compounds are often colored because d-orbital electrons absorb visible light.
- Frequently catalytic — Fe in the Haber process, Pt in catalytic converters.
Examples