Gases - Components in the atmosphere 0.0 / 5 ? ChemistryGasesIGCSEEdexcel Created by: IsobelfjCreated on: 14-04-18 11:04 What does the atmosphere mostly consist of ? Nitrogen and Oxygen 1 of 6 What percentage of Nitrogen is in the atmosphere ( air ) ? 78% Nitrogen 2 of 6 What percentage of Oxygen is in the Atmosphere ( air ) ? 21% Oxygen - which is the only reactive component of the atmosphere 3 of 6 What percentage of Argon is in the Atmosphere ( Air ) ? 0.9% nearly 1% Argon 4 of 6 What percentage of Carbon dioxide in the Atmosphere ( air ) ? 0.04% Carbon Dioxide 5 of 6 How much water vapour can air also contain ? Somewhere between 0 - 4 % water vapour 6 of 6
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