CHEMISTRY The Study of the Nature of Matter and Change Matter – anything that has mass and takes up volume Examples of non-matter things? Change refers to a change in properties – characteristics - of a substance.
Physical Change occurs when a substance changes its physical form: solid -> liquid.
Properties that a substance shows as it reacts with another substance – acidic, basic, oxidant, etc.
A chemical change, a chemical reaction, converts one substance into one or more other substances.
Extensive and Intensive Properties Extensive Properties – depend on the amount of a substance Mass Volume Intensive Properties – independent of the amount Color Melting Point Density
Classifications of Matter Substance – Chemically the same throughout Element – Cannot be broken down into simpler substances by chemical means Compound – Chemical combination of two or more elements. All portions contain the same elements in the same proportions Mixtures – Can be separated into two or more substances by physical means Heterogeneous mixture – non-uniform mixture Homogeneous mixture – uniform mixture
Three States of Matter Solid – has a fixed shape Liquid – takes on the shape of the container, but fills the container only to the volume of the liquid; a liquid/gas interface will be formed. Gas – takes on the shape of the container, and fills the container completely.