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Compounds and Mixtures

Compounds and Mixtures. Substances. Pure Substance - Matter that has the same composition and properties throughout. (made of same atoms or molecules) Compound - Substance whose smallest unit is made up of atoms of more than one element bonded together.

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Compounds and Mixtures

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  1. Compounds and Mixtures

  2. Substances • Pure Substance- Matter that has the same composition and properties throughout. • (made of same atoms or molecules) • Compound- Substance whose smallest unit is made up of atoms of more than one element bonded together. • Often have properties that are different from the elements that make them up.

  3. Mixtures • Mixture- When two or more substances (elements or compounds) come together but don’t combine to make a new substance. • Proportions of the substances in a mixture can be changed without changing the identity of the mixture.

  4. Mixtures • Homogeneous- Same throughout. Cannot see the different parts. • Ex: Brass, sweet tea, kool-aid • Heterogeneous- Has larger parts that are different from each other. • Ex: Pepperoni and mushroom Pizza, toy box filled with toys

  5. Solutions • Well-mixed mixture that contains a solvent and a solute. • Solvent- the part of the solution that represents the majority. It dissolves the solute. • Solute- smaller amount, dissolved by solvent.

  6. Solutions • Colloid- a mixture with tiny particles undissolved. • Ex- milk • Suspension- mixture with larger particles undissolved • Ex- snow globe or pulpy orange juice

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