CHM 1142 Lecture 1: Chapter 1 - Introduction-Matter & Measurement
Document Summary
Chemistry: study of the properties and behavior of matter composition and transformation of matter. Physical chemistry - applies the theories of physics. Analytical chemistry - identi es what and how much of a substance is present. Organic chemistry - study of carbon and hydrogen compounds. Biochemistry - chemical reactions that occur in living organisms. Composition/theoretical chemistry - using computers to solve and study chemistry. Atomic number - the number of protons in the nucleus of an atom {lower left hand number} Atomic weight - sum of protons and neutrons in nucleus {upper right hand corner} Science = observing and then asking questions (1) questions (2) hypothesis (3) experiment (4) new hypothesis/new experiment. Element: substance that has xed compositions (same amount of electrons and protons) and speci c properties. 98 natural elements and the others are synthetically made. Molecules: smallest part of matter that is the same chemically as the whole mass.
