1. Electron Cloud Ms. Khericha and Ms. Rowland

2. Gobstopper Activity!

3. The Atom

4. Nucleus

5. The Atom Nucleus protons Neutrons

6. The Atom Nucleus protons Neutrons Electron Cloud

7. The Atom Nucleus protons Neutrons Electron Cloud Electrons

8. Electron Cloud The electron cloud is the region outside of the nucleus where electrons are most likely to be found. Electrons travel in lanes like a runner on a track. Electrons can be anywhere in their lane. These lanes are called electron shells. Each electron shell has a different energy level. The farther away from the nucleus, the more energy the shell has.

10. Electron Shells The first electron shell can hold up to 2 electrons

11. Electron Shells The second electron shell can hold up to 8 electrons

12. Electron Shells The third electron shell can hold up to 18 electrons

13. Electron Shells The fourth electron shell can hold up to 32 electrons

14. Here is another way to look at it.. Energy LevelNumber of Electrons 1 st energy level2 electrons 2 nd energy level8 electrons 3 rd energy level18 electrons 4 th energy level32 electrons 5 th energy level50 electrons* 6 th energy level72 electrons*

15. Example Hydrogen contains 1 electron Nucleus

16. Example Carbon contains 6 electrons and looks like this Nucleus

17. Your assignment You are going to create the elements on the back of your paper on your electron shell board. On your board, use your Smarties as electrons and put them in the electron cloud. When you complete each one, draw a diagram of it in your notes. When you are done with all of them, you may eat your Smarties.

18. Extension: Subshells http://education.jlab.org/qa/electron_config. html http://education.jlab.org/qa/electron_config. html