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Chemistry 112 Elements and Compounds. What’s the difference?  Elements are the simplest form of matter.  They have a unique set of properties  A compound.

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Presentation on theme: "Chemistry 112 Elements and Compounds. What’s the difference?  Elements are the simplest form of matter.  They have a unique set of properties  A compound."— Presentation transcript:

1 Chemistry 112 Elements and Compounds

2 What’s the difference?  Elements are the simplest form of matter.  They have a unique set of properties  A compound is a substance that contains two or more elements chemically combined in a fixed proportion.  Compounds cannot be separated by physical means, only chemical.  Elements cannot.

3 How do you breakdown a chemical compound?  Chemical changes are required for the breakdown of chemical compounds.  Chemical changes give products that are chemically different from the reactants.  How are compound sentences like chemical compounds?

4 Substances and Mixtures  If the composition of the material is fixed, the material is a substance.  Elements and compounds.  If the composition of the material varies, the material is a mixture.  Homogeneous and heterogeneous mixtures.

5 Symbols and Formulas  Chemical symbols are used to represent elements.  Na, O, S, Au  and chemical formulas are used to represent compounds.  NaCl, H 2 O, CO 2, CaCO 3

6 To be completed:  Questions 20 – 27, pg. 52


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