4.1 The Development of the Periodic Table of Elements
4.2The Arrangement in the
Periodic Table of Elements

4.7 Transition Elements
All transition elements are metals with the following
properties:
• Solids with shiny surfaces
• Very hard compared to metals in Groups 1 and 2
• Have high densities
• Have high melting points and boiling points
Special Characteristics for Several Transition Elements in the Periodic Table Of Elements
- Transition elements function as a catalyst to increase the rate of reaction without undergoing chemical change at the end of the reaction. For example, iron filings are used as a catalyst in the Haber Process
- Transition elements form coloured ions or compounds


4. Transition elements can form complex ions.
Uses of Transition Elements in Industry


