CHEM 1040 Study Guide - Final Guide: Orbital Hybridisation, Ideal Gas Law, Decimetre
6 Dec 2017
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1. 4 matter: physical state and chemical constitution: two principle ways of classifying matter, physical state as a solid, liquid, or gas, chemical constitution as an element, compound, or mixture. Elements, compounds, and mixtures: physical change: is a change in the form of matter but not its chemical identity. Ex) physical state, melting point, and colour: chemical property: a characteristic of a material involving its chemical change. A substance always has the same characteristics (ex. melting point: all substances are made of elements, element: a substance that cannot be decomposed by any chemical reaction into simpler substances. In 1789, lavoisier listed 33 substances as elements (there are 118 today: most substances are compounds, compound: a substance composed of two or more elements chemically combined. Heterogeneous mixture: mixture that consists of physically distinct parts, each with different properties. Homogeneous mixture (a. k. a solution): mixture that is uniform in its properties throughout given samples.
