Metals

• Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. 
• Rusting refers to the corrosion of iron
• To avoid rusting paint over the rust
• Alloy - a metal that is made by mixing two or more metals, or a metal and another substance
• When metals react with water, they form hydrogen gas and a metal hydroxide e.g. sodium + water = sodium hydroxide + hydrogen
• Some metals react faster or give out more energy than others. This can be stored in a reactivity series
• Forming alloys can change chemical and physical properties