Unit 3 ATOMIC CONCEPTS 3.9 What is a Lewis Diagram AIM: How do I draw a Lewis Diagram of any element? DO NOW: Draw a planetary model of Oxygen. How many.

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Presentation transcript:

Unit 3 ATOMIC CONCEPTS 3.9 What is a Lewis Diagram AIM: How do I draw a Lewis Diagram of any element? DO NOW: Draw a planetary model of Oxygen. How many valance electrons does it have? It has 6 valance electrons

Review What is a valance electron? It is the number of electrons In the outer (last) shell of an atom

LEWIS ELECTRON DOT DIAGRAM Chemical symbol surrounded by one to eight dots representing electrons. Definition X

LEWIS ELECTRON DOT DIAGRAM # of dots = valance electrons More Information

X Picture One valance electron LEWIS ELECTRON DOT DIAGRAM

P Example Phosphorus (P) has an electron configuration of LEWIS ELECTRON DOT DIAGRAM

TRY THIS Draw Lewis Dot Diagrams of Helium (He) and Nitrogen (N) He N

NEXT Complete the INDEPENDENT PRACTICE When you are done, you may work on the following: CHEMISTRY VOCABULARY JOURNAL 3.8 PACKET (IF YOU DIDN’T FINISH) - you will be allowed to use this on your quizzes and (some of) your exams