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for Advanced PhySci

substances

cannot be broken down into simpler components and still maintain properties of the original substance
2 categories- elements & compounds

elements

a sample of matter in which all the atoms are alike

compounds

a substance in which 2 or more elements are combined in fixed proportions

mixtures

a material made up of 2 or more substances that can easily be separated by physical means
2 types- heterogeneous & homogeneous

heterogeneous

a mixture in which the different materials can be easily distinguished

homogeneous

a mixture in which 2 or more substances are blended evenly through

solution

a homogeneous mixture of particles so small that they can't be seen with a microscope

suspension

a heterogeneous mixture containing a liquid in which visible particles settle

colloid

a type of mixture that never settles

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