How is reactivity related to an atoms outer shell?

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What does the rate of bubbles that hydrogen give off during a reaction suggest? How reactive are the metals at the top of the reactivity series? Why are most metals found on earth compounds? What ia the most common element that reacts with metals? What metals are found as elements on earth that have not reacted? how is the oxygen extracted from the metal? What metals react with oxygen? What happens when a metal reacts with Oxygen? How is carbon used in reduction? How is carbon extracted from metals? What elements does carbon react with? How does reaction with electrolysis work? How are metals higher than carbon in the reactivity series extracted? Why is electrolysis expensive? How expensive is electrolysis? Why is gold found in its elemental form unlike most metals? What is oxidisation? What is a gain of electrons known as? What is a gain in electrons known as? What is reduction? What is a redox reaction? What is a reaction of metal and acid known as? What does "OIL RIG" stand for? What determines the reactivity of metal? What is the most reactive metal? What is produced when magnesium reacts with dilute hydrochloric acid? What substances are created when a metal reacts with water? What metals are non reactive with acid? What metals are reactive with acid? Why isn't reduction of carbon used to extract aluminium from its ore? Role of electrolyte in the extraction of aluminium