15. The following observations were made during a chemical reaction involving three unknown metals. Analyze the table to help you answer the questions that follow. [5 marks] Reaction Metals Reaction with

hydrochloric acid with water Unknown A Unknown B Unknown C No reaction No reaction The reaction occurred immediately within 1 minute. A large amount of gas was produced and released. Some bubbles were observed on the surface of the metal after 2 minutes. Reaction with vinegar Immediate production of bubbles on the surface of the metal No reaction There was an immediate, rapid production of Small bubbles formed on No reaction bubbles on the surface of the metal. The entire piece the surface of the meta of metal had reacted within 5 minutes. a. List the metals in order from most reactive to least reactive. b. Write a short statement justifying the order of your list. c. If all of the metals were located in the same period on the periodic table but in different groups, which would have the highest group number? Explain your answer with a short statement related to periodic trends.