Mr. Weiler’s Science Lab

UNIT 1 · STUDY GUIDE QUESTION 5

Pure substances

Describe what a pure substance is and give an example.

Pure heliumHeHeHeHeHeHeSeparate atomsOne substancePure waterOHHOHHOHHOHHOHHOHHBonded H₂O moleculesOne substanceMixtureOHHHeOHHHeOHHHeHe atoms + H₂O moleculesTwo substancesSIMPLIFIED SCIENTIFIC MODEL · TIME COMPRESSED · NOT TO SCALE

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