General Chemistry 1.2

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Scientific Notation and Significant Figures

Last updated 5:31 PM on 5/22/26
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7 Terms

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Scientific Notation

used to easily write large/small numbers; written with one non-zero number left of the decimal

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Significant Figures

communicates how precisely a number is known

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3 Rules of Zeroes for SigFigs

1) Leading Zeroes are never Significant
2) Trailing Zeroes are dependent on Decimal (No → not, Yes → yes)
3) Zeroes between SigFigs are always Significant

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Rule for Multiplication and Division

result can’t have more sigfigs than FEWEST sigfig number

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Rule for Addition and Subtraction

result must have same decimal place as least precise digit

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Precision

how close measurements are to each other

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Accuracy

how close measurement is to true value