1. The Bohr Model We’re still talking about Adam the Atom

2. Warm-Up Element Atomic # Atomic Mass # of Electrons # of Protons # of Neutrons Sulfur (S) 13 19 Magnesium (Mg) Argon (Ar) 9 37

3. Let’s think about it… Imagine a stadium. This stadium has three levels. 110 people are in the stadium. 10 people are on the court playing. (5 home and 5 away) 100 people are spectating. As you can see it is a basketball game.

4. Let’s keep imaging… Our one hundred people need seats. The closest section only seats 30 people. The middle section seats a bit more and can seat 50. The farthest section can seat 100. The stadium ushers fill all the seats in a section before moving to another. How do we arrange our fans?

5. Time to draw!

6. The Bohr Model

7. Bohr Model and the Periodic Table The periodic table is made of periods and families.

8. Bohr Model and the Periodic Table The periods are the rows that are left to right.

9. Bohr Model and the Periodic Table The families are the top to bottom columns.

10. Bohr Model and the Periodic Table To find out the number of orbitals you will need look at the period number. You’ll know its right when you see a pattern.

11. Now it’s your turn. Come up with an analogy (like my stadium) to compare the Bohr model to. Be creative guys!

12. Cool Down Draw the Bohr models for Potassium (K) and Calcium (Ca)