1. What is an isotope?
Review Video

2. Station Activity
Go around to the 8 green papers and write down everything you can about those elements (you can use a periodic table)

3. Lithium-7
Lithium-5
Carbon-13
Carbon-14
Oxygen-16
Oxygen-17
Sulfur-32
Sulfur-33

4. Who am I? I have 21 neutrons, 18 electrons, and 19 protons
I have 10 electrons, 7 protons, and 8 neutrons

5. What do you notice about most of the masses on the periodic table?

6. How then are the masses on the periodic table calculated?

7. Another example. . .

8. Let’s Think
Compare and contrast an isotope to an ion (charged atom)