CHM 1045 Chapter Notes - Chapter 1: Si Base Unit, Electric Current, Significant Figures
Document Summary
Chemistry the study of matter and the changes that matter undergoes. Matter anything that has a mass and occupies space. Law a concise verbal or mathematical statement of a reliable relationship between phenomena. Hypothesis a tentative explanation for the observations from an experiment. Theory unifying principle that explains a body of experimental observations and the laws that are based on them. Matter can be either a substance or a mixture of substances. Substance a form of matter that has a definite (constant) composition and distinct properties. States of matter: solid particles are held close together in an orderly fashion with little freedom of motion; does not conform to the shape of its container. Mixture combination of two or more substances in which each substance retains its distinct identity. Homogeneous mixture its composition is uniform throughout. Heterogeneous mixture its composition is not uniform throughout. Quantitative property measured and expressed with a number.
