Assignment:
The 'representative elements' are those in the first two columns and the last six of the periodic table. The middle region of the table represents the transition elements.
When chemists discuss the periodic nature of the elements they focus on mainly the 'representative elements'.
Find two websites that discuss the Periodic Table. Provide a short evaluation of the Periodic table based on the information provided at the site. Provide the urls for each website. Finally, explain what the 'representative elements' are and why they are used to explain trends more than transition elements.
Provide complete and step by step solution for the question and show calculations and use formulas.