CHEM 0110 Lecture Notes - Lecture 1: Joseph Priestley, Antoine Lavoisier, Sulfur
Document Summary
Heterogeneous mixture: a mixture that consists of physically distinct parts, each with different properties. Homogeneous mixture: a mixture that is uniform in his properties; also called a solution. Physical property: a characteristic that can be observed for a material without changing its chemical identity. Color, melting point/boiling point, density, texture, malleability, Physical change: a change in the form of the matter but not its chemical identity. Chemical change=chemical reaction: a change in which one or more kinds of matter are transformed into a new kind of matter or several new kinds of matter. Chemical property: a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed. Experiment: an observation of natural phenomena carried out in a controlled manner so that the results can be duplicated and rational conclusions obtained. Hypothesis: a tentative explanation of some regularity of nature.
