CHEM 111 1st Edition Lecture 2 Past Lecture Review:Science is knowledge, and cannot be done without experience or experimentation. Chemistry is the study of matter and it’s interactions with other matter or energy. These interactions form into things such as compounds/elements.Current Lecture: 1/16/2014Accuracy - Agreement of a measurement with the true value.Precision – Agreement among repeated measurements of the same quantity.Significant Figures: The number of significant figures is the number of digits from the first non-zero digit through the last reported digit.- The uncertainty is at least +/- 1 unit in the last reported digit.- Zeros preceding the first non-zero digit are not significant.- A zero is only significant if preceded by a non-zero digit.Ex: How many significant figures are in each of the following?0.0012 (2)106 (3)900.0 (4)1.0012 (5)0.001060 (? Try it! ?)Base Units in the SIQuantity Unit AbbreviationLength Meter mMass Kilogram kgTime Second sTemperature Kelvin K Amount Mole molElectric Current Ampere ALuminous Intensity Candela cdCommon Prefixes Used with SI UnitsPrefix Abbreviation MeaningThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Mega- M 106Kilo- k 103Centi- c 10-2Milli- m 10-3Micro- u 10-6Nano- n 10-9Pico- p 10-12 Current Lecture Review:Base Units, Significant Figures, Prefixes for Base Units, Difference between accuracy and