Chap1 - p Types of Mixtures-Homogenous: Uniform...

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Sheet1 Page 1 Matter: Definition: Anything that has mass and occupies space -Solid, liquid, gas, (plasma) -Solid: Rigid definite volume and shape. like a rock -Liquid: Definite volume, no definite shape. Water -Gas: no fixed volume or shape. Oxygen, Nitrogen. -Pure substance: constant composition. Compounds and elements -Element: Cannot be dcomposed into simpler substances by chemical or physical methods. Represented by symbols -Compound: Combination of two or more substances in which each substance changes its chemical identity. Can only be sep a -Mixture: Combination of two or more substances in which each substance retains its own chemical identity. Mixture can be se
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Unformatted text preview: p Types of Mixtures-Homogenous: Uniform composition-Heterogenous: Non-uniform composition Physical and Chemical change-Physical change: Change in physical appearance but chemical identity is the same->Water -> boiled -> steam->Water -> frozen -> ice-Chemical change: Change in chemical identity occurs-> H2(gas) + O2 (gas) = H20(water) The melting of wax: physical change or a chemical change?-Physical, because it is only changing shape The burning of wax: Physical or chemical?-Chemical, because it is a process of combustion...
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