1. Warm Up9-11-15 1. 1. When will light (photon) emit from an atom? 2. 2. Protons, Neutrons, and Electrons for 195 Au 3. 3. An atom has 14 neutrons and 19 protons, What element is it? 4. 4. Neutrons and protons have the same _____, protons and electrons are the same______ Homework Finish Lab Flame Sept 14 - Quiz unit 2 Sept 18 - Online HW unit 2 Agenda Notes Unit 2-5 Lab Flame Turn in WS unit 2-4

2. Unit 2-5 Electron Configuration (locating electrons)

3. Energy Level Energy level (n) – represented by a whole number Maximum number of electrons that can fit in an energy level is: 2n 2 -How many e - in level 2? -How about 3?

4. Orbitals SPDSPD Orbitals (s,p,d,f) – are sublevels in each energy level 2e 6e 10e

5. Energy Level and Electron Maximum electrons energy level (n) 1 2 2 8 3 18 4 32 s, p Sublevel per energy (n) s s, p, d s, p, d, f

6. Electron Configurations 12345671234567

8. Electron Configurations Examples 1. D orbitals are 1 less energy 2. Cu and Cr are exceptions

9. Electron Configuration Problems Answers Try: Try: Ca Ca S Ti Ti Fe Fe 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 1s 2 2s 2 2p 6 3s 2 3p 4 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 2 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6

10. Flame Test Lab Clean/Dry and Bring your plate up for the compounds (only get a small amount!!) Clean/Dry and Bring your plate up for the compounds (only get a small amount!!) Rinse your nichrome wire in between each compound to clean it Rinse your nichrome wire in between each compound to clean it

11. Clean Up Procedure All solid compounds from your plate goes into the trash can All solid compounds from your plate goes into the trash can Clean your lab table Clean your lab table If your bunsen burner doesn’t have blue flame please use a wet paper towel and wipe the tip (caution hot) to get burned residue off it. If your bunsen burner doesn’t have blue flame please use a wet paper towel and wipe the tip (caution hot) to get burned residue off it. Rinse your hands after you’re done cleaning up Rinse your hands after you’re done cleaning up

12. Assignments Summary Summary Complete and turn in Unit 2-4 worksheet Complete and turn in Unit 2-4 worksheet Finish lab write up due next class Finish lab write up due next class