Electron Configurations

Periodic Table Structure 1 2 ENERGY LEVEL = SHELL 3 3 4 5 4 6 5 7 6 4 5 Energy Levels Exceptions to row rule

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

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

Counting Electrons NEUTRAL atoms: protons = electrons 1 2 3 4 5 6 7 8 9 10 11 12

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

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

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

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