Chemistry - Topic 1 and Topic 9
- Created by: ellierose296
- Created on: 18-06-19 16:52
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- Chemistry
- Topic 1
- Elements
- A substance formed by one type of atom
- There are 118 different elements
- Two or more chemically bonded elements are called a compound
- They do not share the properties of the elements they are made from
- Models of the atom
- Bohr / nuclear model
- Suggests that electrons orbit the nucleus at specific distances (shells)
- Came from the gold and alpha particle experiment
- Radius of 1nm
- Protons
- Mass of 1 Charge of 1
- Electrons
- Mass of almost 0 Charge of -1
- Bohr / nuclear model
- Elements
- Topic 9
- Air is...
- 80% Nitrogen
- 20% Oxygen
- The atmosphere at first
- Hot when first formed
- Lots of volcanic activity
- volcanoes release gases
- Carbon dioxide
- Nitrogen
- Methane
- Azane
- Water vapour
- volcanoes release gases
- Plants produced oxygen through photosynthesis
- Decreased carbon dioxide
- Greenhouse effect
- Without it the world would be too cold to live in
- Causing global warming
- Global Warming
- Carbon Footprint
- Total amount of greenhouse gases emitted over the full life cycle of a product, event or servicee
- Reduction
- Increased use of alternative energy supplies
- Capture and storage of carbon
- Carbon taxes and licences
- carbon off-setting
- Reduction Issues
- Lack of public information and education
- Economic considerations
- Combustion
- Pros of complete combustion
- Poisonous carbon monoxide is not produced
- More heat per gram of fuel is produced
- Pollution
- Combusting fuels release gases into the air
- Carbon dioxide
- Sulphur dioxides
- Cause acid rain and respiratory problems
- Oxides of nitrogen
- Cause acid rain and respiratory problems
- Oxides of nitrogen
- Combusting fuels release gases into the air
- Pros of complete combustion
- Air is...
- Topic 1
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