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7 Cards in this Set
- Front
- Back
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What is a compound? and give and example
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Two or more different types of atoms/elements chemically combined
eg. H₂O |
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What three ways show a reaction has made a chemical change?
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A new chemical is made
It can only be reversed by a chemical reaction It doesn't just alter the form of the chemical |
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What 4 ways show a reaction has taken place
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Heat is given out
A colour change occurs A gas/solid precipitate is produced Sound is produced |
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What is a mixture?
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A collection of substances mixed together but not chemically bonded
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What is a element?
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An element is a pure substance and is made of identical atoms
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What is a molecule? give an example
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Two or more atoms chemically bonded
eg.O₂ , N₂ |
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What is an atom?
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Smallest stable particle that exists
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