'5 25 ml 26' diaporamas de présentation

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Unit 1

Unit 1 . Properties and Changes in Matter. Physical Properties. can be observed or measured without changing the composition of matter. are used to observe and describe matter. describe bulk quantities of atoms, not single atoms Ex. density, color, malleability.

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Chemical Foundations

Chemical Foundations. Chapter 1. Chemistry. Chemistry deals with situations in which the nature of a substance is changed by altering its composition so that entirely new substances are synthesized or particular properties of existing substances are enhanced. Science.

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Measurements & Calculations

Measurements & Calculations. Chapter 2. Nature of Measurement. Measurement - quantitative observation consisting of two parts: Part 1 - number Part 2 - scale (unit) Examples: 20 grams 6.63 ? ?? ??? Joule seconds. Scientific Notation.

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