1. Notes Waves

2. Valence electrons –E–Electrons in the outermost energy level Ar Ge Mg K As 1s 2 2s 2 2p 6 3s 2 3p 6 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 1s 2 2s 2 2p 6 3s 2 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 3 4p 2

3. Energy of an electron ground state: –t–the state of an e – in its original position (lowest energy) excited state: –t–the state of an e – when it gains energy and jumps to a higher level

4. What goes up must come down When an e – falls back to its ground state the built up energy is released as a photon

6. Wavelength ( ) –the distance between one point in the wave & the nearest point just like it

7. Frequency ( ) –waves per second

9. Test Today!!! Get out your review. We’ll go over it in class.