CHEM 1127Q Chapter Notes - Chapter 1: Tonne, Graduated Cylinder, Metric System

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CHEM 1127Q Full Course Notes
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CHEM 1127Q Full Course Notes
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3 phases of matter: solid, liquid, gas fixed shape + volume fixed volume, but not rigid in shape (takes shape of container) Neither fixed volume nor shape (takes on shape and volume of its container) Can be classified with respect to its compositions: pure substances each has a fixed compositions + unique set of properties, mixtures composed of 2 or more substances. Elements type of matter than cannot be broken down into 2 or more pure substances: 118 known elements, 91 of those occur naturally. Defined by its symbol: ag, br, h, pb, etc) Pure substance that contains more than 1 element. Have fixed compositions: a given compound always contains the same elements in the same percentage by mass. Can be resolved into elements through many different methods: heat, electrolysis. Passing an electric current through a compound. Mixtures contains two or more substances combined in such a way that each substance retains its chemical identity.