C4.1.5

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  • Reactivity of Elements
    • Metals form positive ions in reactions.
    • The easier it is for a metal to form a positive ion, the more reactive it is.
    • A metal can react with water or dilute acids if it's more reactive than Hydrogen.
      • Calcium reacts with water and dilute acids but Copper doesn't.
    • Metals with water: Metal Hydroxide and Hydrogen Gas.
    • Metals with acids: A salt and Hydrogen Gas.
    • Reactions can be used to put metals in order of their reactivity.
    • The more reactive the metal, the greater rate of Hydrogen production.
      • More vigorous bubbling means eye protection!
    • A more reactive metal can displace a less reactive metal.
    • Copper is more reactive than Silver and can displace it from a Silver Nitrate solution.
    • Displacement reactions are an example of Redox Reactions: Oxidation (loss), Reduction (gain)
    • Some patterns of the reactivity in the Periodic Table are:
    • Group 0 don't react.
    • Reactive Non-Metals may form covalent compounds with each over.
    • Metals may form ionic compounds with reactive non metals.
    • Group 1 and 2 metals are more reactive than Transition Metals.
      • They become more reactive as you go down the group.
    • Group 7 non-metals become less reactive down the group.

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