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13 Cards in this Set
- Front
- Back
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what charge does atoms have
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atoms will all the time have a 0 charge.
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what are atoms made of?(3 points)
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protons
electrons nuetrons |
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what is on the outer of the a atom.
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electrons
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around how many elements are there that we know of
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around 115-120
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what are the nobal gasses
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these are the unreactive elements of the periodic table
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what is thermal decomposition
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this is the break down of a compund due to to extreme heat.
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how is cement made? (limestone)
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it is added to clay and heated to produce cement
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what is a alkene?
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it is a form of hydrocarbon with all same general formula
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how is crude oil made?
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it is made over millions from dead animals or plants.
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what is distillation mainly used for?
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it is used to seperate ethenol from water
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what processes are used to distill ethonal solution?
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it is heated up and evaporated to a vapour, it then turns into a vapour and travelles through a pipe to then be condensed a liquid. it will be then seperated from the water.
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what is fractionall distilation used for?
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it is used for seperating crude oil into sperate fractions
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what is the heat range bertween the hottest heat needed and the coldest heat needed?
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it is a range between 25°C and 350°C
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