04 NOV 14 Starter: 39 40 compound and element difference Go back to Earth’s Major Elements to help you answer.

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Presentation transcript:

04 NOV 14 Starter: compound and element difference Go back to Earth’s Major Elements to help you answer.

Starter: oxygen The Earth’s crust contains an abundant (plentiful) amount of oxygen.

Starter: oxygen The human body contains an abundant (plentiful) amount of oxygen.

Starter: oxygen Sea water contains an abundant (plentiful) amount of oxygen.

Practice: Elements Compounds

Practice:  Elements are pure substances represented by a chemical symbol.  Other substances are made using elements, either in pure form or a combination of elements.  Example: The most abundant element in the Earth’s crust is oxygen (O).

Practice:  A compound is a combination of elements chemically combined.  Compounds are two or more elements, such as water (H 2 O) or salt (NaCl).  The Earth’s crust is combined in compounds such as Silicates (SiO 4 )which contains both elements Silicon and Oxygen.

Application: Chemical formula Number of elements H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C Number of elements? 2 elements

application: Chemical formula Number of elements Name of elements H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C Name of elements? 2 elements H=hydrogenO=oxygen

connection: Element or compound? Chemical formula Number of elements Name of elements Element or compound H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C 2 elements H=hydrogenO=oxygen compound

exit: Model? Chemical formula Number of elements Name of elements Element or compound model H2OH2O NaCl C 6 H 12 O 6 S NH 4 OH C 2 elements H=hydrogenO=oxygen compound

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