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Measurement, SigFigs

TermDefinition
qualitative observation type of observation that describes a characteristic
quantitative observation type of observation that provides a numerical measure of something
mega- million
kilo- thousand
deci- tenth
centi- hundredth
milli- thousandth
micro- millionth
nano- billionth
pico- trillionth
how many significant figures does the number 606 have? 3
how many significant figures does the number 0.00420 have? 3
how many significant figures does the number 200.0 have? 4
accuracy how close a measurement is to the correct value
precision how close a set of measurements are to each other
accepted/literature value a correct value based on credible references
experimental/your value the value measured in your lab
error the difference between the accepted and experimental values
chemistry the science that investigates and explains the structure and properties of matter
matter anything that has mass and takes up space (volume)
pure substance matter with the same fixed composition and properties
element the simplest form of matter, made up of atoms, has one chemical symbol
compound a chemical combination of two or more elements joined together in a fixed composition, made of molecules/formula units
formula a combination of chemical symbols that show the chemical make-up of a compound and the number of atoms/ions for each element
mixture a combination of two or more pure substances in which the basic identity of each substance is not changed
Popular Chemistry sets

 



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