Carbon dioxide - This gas makes up only 0.04% of the atmosphere, Surface area - Using powdered reactants increases this available for the reaction, Magnesium - This metal burns in air with a bright white flame, Hydrogen - In small amounts, the combustion of this gas results in an explosion which gives a 'squeaky pop', Nitrogen - An inert gas which makes up the majority of our atmosphere, Ionic - Metal oxides are an example of this type of compound, Covalent - Non metal oxides are an example of this type of compound, Expand - Gases do this when heated, Insoluble - If a substance does not dissolve it is described as this, Excess - A reactant we have a lot of is said to be in......,

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