Electron Cloud

Ms. Khericha and Ms. Rowland

Gobstopper Activity!

The Atom

The Atom Nucleus

The Atom Nucleus

protons

Neutrons

The Atom Nucleus

protons

Neutrons

Electron Cloud

The Atom Nucleus

protons

Neutrons

Electron Cloud

Electrons

Electron Cloud

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.

Electron Shells• The first electron shell

can hold up to 2 electrons

Electron Shells• The second electron

shell can hold up to 8 electrons

Electron Shells• The third electron shell can

hold up to 18 electrons

Electron Shells• The fourth electron shell can

hold up to 32 electrons

Here is another way to look at it.. Energy Level Number of Electrons

1st energy level 2 electrons

2nd energy level 8 electrons

3rd energy level 18 electrons

4th energy level 32 electrons

5th energy level 50 electrons*

6th energy level 72 electrons*

Example

• Hydrogen contains 1 electron

Nucleus

Example

• Carbon contains 6 electrons and looks like this

Nucleus

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.

Extension: Subshells

• http://education.jlab.org/qa/electron_config.html