Chemistry 11 Bahia: PERIODIC TABLE TRENDS

Just watch

Start watching at 2:05

Just take brief notes on each model, including a sketch

A good overview of how weird electrons are and an intro into orbitals

Another overview. When she talks about n=1, that means the first energy level, n=2 means 2nd energy level etc.
She talks fast. Don't worry, the Powerpoint notes cover all this as well

You may need to watch this to understand Electron Configurations

A short cut that I prefer you use all the time