Bohr and Lewis

​TUESDAY 9/20: UNIT 2 – Lewis Dot and Bohr models

• Thurs 9/22- Unit 2 Test, MOS due

• Fri 9/23 is a PLD days​

Announcements/Reminders

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Bellwork:

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Agenda

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ON GC​

• Bellwork

• Video- https://photos.app.goo.gl/VrB4s3tBoSwmhXQk8

• ​Lewis dot & bohr models

​HW:

​PAGES 28-31 if not finished in class

Multiple Choice

How many electrons can go in the first energy level?

• 2

• 8

• 18

• 32

Multiple Choice

How many electrons can go in the second energy level?

• 2

• 8

• 18

• 32

Multiple Choice

How many electrons can go in the third energy level?

• 2

• 8

• 18

• 32

​Draw the Bohr Diagram for the following:

• H, Li, Na

​Draw the Bohr Diagram for the following:

• H, Li, Na

• What do you notice about all of the valence shells?

​Draw the Bohr Diagram for the following:

• H, Li, Na

• What do you notice about all of the valence shells?

• They all have one electron!

​Draw the Bohr Diagram for the following:

• H, Li, Na

• What do you notice about all of the valence shells?

• They all have one electron!

• Now try this column…

  • Be, Mg

​Draw the Bohr Diagram for the following:

• H, Li, Na

• What do you notice about all of the valence shells?

• They all have one electron!

• Now try this column…

  • Be, Mg

• Valence trend…

Multiple Choice

What is a Lewis Dot Structure?

• It shows all of the particles in the atom.

• Contains protons and neutrons

• Only shows the element symbol and it's outer most electron shell

• Contains protons and electrons

Multiple Choice

What is the the outermost shell with electrons?

• Shells

• Isotope

• Orbit

• Valence

Multiple Choice

How many valence (outer) electrons does an Oxygen atom have?

• 2

• 6

• 8

• 16

Multiple Choice

What is the mass number of this atom of Chlorine?

• 17

• 18

• 35

• 35.453

Multiple Choice

Which element is this?

• Calcium

• Chlorine

• Silicon

• Potassium

Multiple Choice

Which Bohr model represents Be?

Multiple Choice

Which Bohr model represents Neon?

Multiple Choice

Is this a correct dot diagram for fluorine (F)

• Yes

• No

Multiple Choice

How many electrons should Nitrogen have around its Lewis dot model?

• 1
• 3
• 4
• 5

Multiple Choice

What is the correct lewis dot diagram for Boron?

​Practice on page ​28-31

Finish for HW​

Some text here about the topic of discussion