1. Do Now How many protons does nitrogen (N) have?

2. Agenda 1.Anticipatory Set 1.Do now – collection 2.Homework collection 3.Team Names 4.Review 2.Notes – How to draw an atom 3.Group Practice 4.Independent Practice 5.Closing

3. R1 What is the symbol for radon?

4. R2 What is the atomic mass of cobalt?

5. R3 What is the atomic number of krypton?

6. R4 Which of the following facts about barium is incorrect? – It’s symbol is Ba – It’s atomic number is 65 – It’s atomic mass is 137.327

7. 8.3 Bohr Models

8. Bohr Models Bohr models allow us to make a drawing that represents an atom.

9. Bohr Models First – draw the nucleus of the atom. Second – draw the electrons in their shells. Nucleus Electrons

10. Bohr Models 2 electrons can fit in the first shell. 8 electrons can fit in all the other shells.

11. Valence Electrons The number of electrons in the outside shell is your number of valence electrons.

12. GP1 What element is this? How many valence electrons does it have?

13. GP2 What element is this? How many valence electrons does it have?

14. GP3 Draw a Bohr model of Helium. How many valence electrons does it have?

15. GP4 Draw a Bohr model of Oxygen. How many valence electrons does it have?

16. GP5 Draw a Bohr model of Aluminum. How many valence electrons does it have?

17. Exit Slip – On your post-it note. You do need your name on it. 1.Draw a Bohr model of carbon (C). 2.How many valence electrons does carbon have?