CHY 104 Lecture 1: MATTER & CALCULATIONS
Document Summary
Examples: color, shape and mass: chemical properties of matter, chemical properties can be observed or measured only by attempting to change the matter into new substances. Examples: flammability and the ability to react (e. g. when vinegar and baking soda are mixed: physical & chemical changes, physical changes of matter, physical changes take place without a change in composition. Examples: freezing, melting, or evaporation of a substance (e. g. water: chemical changes of matter, chemical changes are always accompanied by a change in composition. Examples: burning of paper and the fizzing of a mixture of vinegar and baking soda: dalton"s 1808 atomic theory, all matter is made up of tiny particles called atoms. Substances called elements are made up of atoms that are all identical. Substances called compounds are combinations of atoms of two or more elements. Every molecule of a specific compound always contains the same number of atoms of each kind of element found in the compound.
