1. Electron Configurations

2. Periodic Table Structure1 2
ENERGY LEVEL = SHELL 3 3 4 5 4 6 5 7 6 4 5
Energy Levels
Exceptions to row rule

3. Periodic Table Structure
SUBSHELLS = s, p, d or f s p d f
REMEMBER: some people drive fast

4. Where have all the electrons gone??
GOAL: describe where electrons are located
REMEMBER: you can never know the exact location of an electron, just the most likely place it will be (think ceiling fan)
We use shells and subshells
Numbers = shells
Letters = subshells

5. Counting Electrons NEUTRAL atoms: protons = electrons 1 2 3 4 5 6 7 89 10 11 12

6. Element Battle Ship
What are the “coordinates” for C? C
Think of electron configurations a little like battle ship.

7. Element Battle Ship
What are the “coordinates” for Ca? Ca
Think of electron configurations a little like battle ship.

8. “Coordinates” What do the “coordinates” refer to?
the last electron of that element
What about the rest of the electrons?!

9. Periodic Table Structure
Think of filling electrons like filling the seats to a concert or stadium. People will fill front to back, electrons fill the same way. s 1
FRONT 2 3 s p 3 4 d 5 4 6 5 7 6 f 4 5