Understanding Atoms: Subatomic Particles, Periodic Table, and Isotopes

1. You need… • 3 colored pencils or markers: Red Blue Yellow • Your Periodic Table of Elements • Cornell Doodle Notes

2. The Atom

3. 1. What is an atom? The smallest part of a chemical element that can exist

4. 2. What are the subatomic particles?

5. 2. What are the subatomic particles?

6. 2. What are the subatomic particles?

7. 2. What are the subatomic particles?

8. 3. Where are the subatomic particles? Color the protons red Color the neutrons yellow Color the electrons blue Label the parts of the atom _____ P _____ N _____ E

9. 3. Where are the subatomic particles? nucleus Color the protons red Color the neutrons yellow Color the electrons blue proton Label the parts of the atom electron _____ P _____ N _____ E neutron

10. 3. Where are the subatomic particles? nucleus Color the protons red Color the neutrons yellow Color the electrons blue proton Label the parts of the atom electron 8 _____ P _____ N _____ E 8 8 neutron Oxygen

11. Why are the number of protons and electrons equal?

12. Why are the number of protons and electrons equal? Creates a neutral, non charged atom

13. 4. What is an isotope? Atoms of the same element that have a different number of neutrons

14. 5. What does the Periodic Table tell us? Find Lithium on your periodic table: _____ _____ Lithium _____ # of _______________ and # of _______________ _______________ + _______________

15. Find Lithium on your periodic table: 3 Li Lithium 7 # of _______________ and # of _______________ Atomic Number Symbol Element Name _______________ + _______________ Atomic Mass

16. Find Lithium on your periodic table: PE 3 Li Lithium 7 # of PROTONS and # of ELECTRONS Atomic Number Symbol Element Name PROTONS+ NEUTRONS Atomic Mass

17. We can use this information to calculate the number of protons, neutrons, and electrons in an atom of each element. Atomic Number: _____ Atomic Mass: _____ # P _____ # N _____ # E _____ 3 Li Lithium 7

18. Part E: We can use this information to calculate the number of protons, neutrons, and electrons in an atom of each element. PE Atomic Number: 3 Atomic Mass: 7 # P 3 # N 4 # E 3 3 Li Lithium 7

19. Let’s Practice: Use your periodic table to fill in the missing information 14 ___ Silicon 28.086 Atomic # = _____ Atomic Mass= _____ # of Protons = ______ # of Neutrons = ______ # of Electrons = ______

20. Finish the review worksheet. • Use your Periodic Table to finish the chart on p. 3 of your Cornell Doodle Notes. • Finish coloring your Cornell Doodle Notes. Tomorrow… Isotopes