Chem unit 2 presentation

Chemistry Unit 2 How does matter change?

Unit 2: Main Ideas ,[object Object],[object Object],[object Object],[object Object]

2:1 Properties of Matter ,[object Object],[object Object],[object Object],[object Object]

States of Matter ,[object Object],[object Object],[object Object],[object Object]

States of Matter ,[object Object],[object Object]

Physical Properties of Matter A physical property is a characteristic that can be observed or measured without changing the sample ’s composition.

Physical Properties of Matter ,[object Object],[object Object],[object Object],[object Object]

Chemical Properties of Matter The ability of a substance to combine with or change into one or more other substances is called a chemical property . ,[object Object],[object Object],[object Object]

2:2 Changes in Matter ,[object Object],[object Object],[object Object],[object Object]

Physical Change A change that alters a substance without changing its composition is known as a physical change . ,[object Object],[object Object],[object Object]

Chemical Changes A change that involves one or more substances turning into new substances is called a chemical change . ,[object Object]

Chemical Changes A change that involves one or more substances turning into new substances is called a chemical change . Examples: Decomposing, rusting, exploding, burning, or oxidizing are all terms that describe chemical changes.

Conservation of Mass The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, it is conserved. ,[object Object],[object Object]

2:3 Mixtures of Matter ,[object Object],[object Object],[object Object],[object Object]

Mixtures A mixture is a combination of two or more pure substances in which each pure substance retains its individual chemical properties. ,[object Object],[object Object]

Mixtures ,[object Object],[object Object],[object Object]

Separation of Mixtures ,[object Object],[object Object],[object Object]

Separation of Mixtures ,[object Object],[object Object]

2:4 Elements and Compounds ,[object Object],[object Object],[object Object],[object Object]

Elements An element is a pure substance that cannot be separated into simpler substances by physical or chemical means. ,[object Object],[object Object],[object Object]

Compounds ,[object Object],[object Object],[object Object]

Compounds vs. Elements ,[object Object],[object Object]

Law of Definite Proportions ,[object Object],[object Object],[object Object]

Percent by Mass The relative amounts are expressed as percent by mass , the ratio of the mass of each element to the total mass of the compound expressed as a percentage.

Law of Multiple Proportions The law of multiple proportions states that when different compounds are formed by a combination of the same elements, different masses of one element combine with the same relative mass of the other element in whole number ratios. ,[object Object],[object Object]

Study Guide ,[object Object],[object Object],[object Object],[object Object]

2:5 Accumulating Content and Skills ,[object Object],[object Object]

Prefixes and derived units ,[object Object]

Accuracy and Precision ,[object Object]

Error and Percent Error ,[object Object]

Scientific Method ,[object Object]

Review ,[object Object],[object Object],[object Object],[object Object]

Review ,[object Object],[object Object],[object Object]

Review ,[object Object],[object Object]

Chem unit 2 presentation

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Chem unit 2 presentation