1. Quick draw: Draw a model of an atom (Remember that an atom is made
of protons neutrons and electrons)
Label where you think these go in your model
It’s okay if it is not perfect OR accurate… just try!

2. Models of atoms
Structure of Life

3. Structure of Universe

4. Structure of Universe

5. Niels Bohr chillin’ with Einstein

6. Structure of Universe
Protons and Neutrons are located in the center of the atom
Electrons orbit around the center of the atom

7. Bohr Model
How do we know this is what carbon looks like?
6 P
6 N

8. Bohr Model
Protons and Electrons equal the number on top of the element in the symbol
Why are there two rings?
6 P
6 N

9. Bohr Model Each row has a different number of rings 1 ring 2 rings

10. Bohr Model
6 P
6 N
1 ring
2 rings
3 rings
4 rings
5 rings

11. Bohr Model
Why are there different numbers of electrons in different rings?
6 P
6 N

12. Bohr Model
1 ring with 2 electrons max in this ring
2 rings with 8 electrons max in this ring
3 rings with 18 electrons max in this ring
Each ring can only hold a maximum amount of electrons as there are elements in that row

13. Fill in your periodic table1 8
1 ring 2 3 4 5 6 7
2 rings
3 rings
4 rings
5 rings

14. Bohr Model
6 P
6 N

15. Bohr Model
8 P
8 N
1 ring
2 rings
3 rings
4 rings
5 rings

16. Bohr Model 12 P 12 N 1 ring with 2 electrons max in this ring
2 rings with 8 electrons max in this ring
3 rings with 8 electrons max in this ring

17. Practice
Draw a Bohr model for each element:

18. Niels Bohr and Gilbert N. Lewis

19. Bohr model and Lewis Dot
6 P
6 N
1 ring 4
2 rings
3 rings
4 rings
5 rings

20. Bohr model and Lewis Dot
8 P
8 N
1 ring 6
2 rings
3 rings
4 rings
5 rings

21. Bohr model and Lewis Dot
12 P
12 N
1 ring with 2 electrons max in this ring 2
2 rings with 8 electrons max in this ring
3 rings with 8 electrons max in this ring

22. Lewis Dot Lewis made a simpler model for each element
Lewis Dot is concerned with the valence electrons (the electrons in the outer shell)
Mg has 2 valence electrons

23. Practice
Draw a Lewis Dot model for each element:

24. Practice 1 8
1 ring 2 3 4 5 6 7
2 rings
3 rings
4 rings
5 rings

25. Review video

26. Review Log Turn to the back of your notebook to the lined paper
Write the date then Chemistry Review Log
Describe the differences between the Bohr Model and Lewis Dot models.