Do Now: 3/31/16 Use your Periodic Table to help you complete the first

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Presentation transcript:

Do Now: 3/31/16 Use your Periodic Table to help you complete the first HW: Finish Electron Shells worksheet, if necessary. Current Events #25-the end tomorrow. Quiz tomorrow!!!! Do Now: 3/31/16 Use your Periodic Table to help you complete the first section of the “Practice calculating elements and atoms” worksheet.

Challenge: Caffeine C8H10N4O2 3 3 3 24 3 3 2 6 6 2 Challenge: Caffeine C8H10N4O2

Topics on Tomorrow’s Quiz Organization of Periodic Table Atoms: PNE Metals, Nonmetals and Metalloids Counting atoms and elements Extra help is available during your lunch period today.

New Topic: Electron Shells Chemistry has rules, too! NOT ON QUIZ TOMORROW What are the rules runners need to follow when using a track like this? Chemistry has rules, too!

Notes: Electron Shell Rules Each shell has a maximum number of electrons it can support. The first three shells hold maximum of: shell 1: 2 electrons shell 2: 8 electrons shell 3: 8 electrons The last shell is called a “valence” shell. It may not be filled to its capacity. If it is filled, it is “stable”.

Calcium 20 40 -20 20 20 .

10 20 -10 10 2e- 8e- 10 10

12 -6 6 6 2e- 4e- 6 6 24 -12 12 12 2e- 8e- 12 2e- 12

27 -13 14 13 14 2e- 8e- 3e- 13 Argon 40 -18 22 18 22 2e- 8e- 8e- 18

. . . . .