CH 104 Lecture Notes - Cookie Dough, Chemical Change, Chemical Property
Document Summary
Matter: anything that occupies space and has mass. Plasma: fourth state of matter is gaseous with appreciable numbers of electrically charged particles. Element: pure substance that cannot be broken down into simpler substances by chemical change. Compound: pure substances comprised of two or more elements. Homogenous mixture: known as a solution, that appears to be the same throughout and has uniform composition. Heterogenous mixture: mixture with a composition that varies from point to point (i. e. cookie dough, cereal) Although there are over 100 elements, tens of millions chemical compounds result from different combinations of these elements. Each compound has a specific composition and possesses definite chemical and physical properties that distinguish it from all other compounds. Many ways to combine elements and compounds to form different mixtures. Eleven elements make up approximately 99% of earth"s crust and atmosphere. Oxygen constitutes around and silicon around of the total quantity of these elements.
