CHEM-C 243 Lecture Notes - Lecture 1: Decimal Mark, Significant Figures, Leading Zero
Document Summary
H2o2: recall diatomic elements: br i n cl h o f, chemical reaction- one substance changes to another by reorganizing the way atoms are attached to each other. Procedure for processing an understanding certain types of information. Scientists always challenging current beliefs, asking new questions: fundamental steps of the scientific method, scientific models. Hypothesis- a possible explanation for an observation. Theory/model- set of tested hypotheses that gives an overall explanation of some natural pheonomenon. Section 3- units of measurement: measurement- quantitative observation consisting of number and scale (unit, fundamental si units. Section 4- uncertainty in measurement: uncertain digits must be estimated, measurements always have some degree of uncertainty. Record certain digits, estimate last: volume of liquid read at bottom of curve/meniscus, accuracy- agreement of a particular value with the true value (correctness, precision- degree of agreement among several measurements of the same quantity (consistency)
