Define an element/ compound/ mixture.
element | pure substance that cannot be broken down into simpler substances
compound | pure substance that consists of 2 or more elements chemically combined
mixture | consists of 2 or more substances that not chemically combined
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State the 4 differences between compounds & mixtures [SPEC].
- mixtures can be separated using physical methods but compounds can only be separated using chemical methods
- mixtures retain the properties of the compomenets but compounds have different properties from its constituent elements
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State the 4 differences between compounds & mixtures [SPEC].
- energy is released/ taken in when a compound is formed but no energy is released/ taken in when a mixture is formed
- (composition) in compounds, the elements are combined in a fixed ratio; in mixtures, the substances can be mixed in any ratio
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