1. Gifted Chemistry - Week 8 MondayChapter 4 Test; Lesson 5-1 Vocab Sheet Tuesday Notes and Guided Practice: Electromagnetic Spectrum; Study Guide 5-1 WednesdayEM Spectrum; Practice Problems ThursdayNotes: Bohr Diagram and Quantum Theory FridayLab: Flame Tests

2. Most Missed Quia – Week 7 31.52 g of a certain radioactive element has a half life of 8.0 hours. After 26 hours, how much of that element remains? Round to 4 sig figs. (Don't forget the unit!) (31.52)(.5) 26/8 3.313 grams

3. Most Missed Quia – Week 7 Potassium-40 has how many neutrons? 40 – 19 21 neutrons

4. Most Missed Quia – Week 7 Who is credited with this atomic model? Thomson & Dalton

5. Most Missed Test Questions The number of protons plus neutrons in an atom is called its: a.atomic number b.average atomic mass c.group number d.mass number

6. Most Missed Test Questions Carbon-14 has a half-life of 5730 years. How old is a wooden object if 70% of the Carbon-14 has decayed? a.2948 years b.1280 years c.9950 years d.4321 years

7. Ch. 5 – Electrons in Atoms Quantum Theory Wave and Particle Light and Quantized Energy Electron orbitals and sublevels Electron Configuration Valence Electrons and Spin

8. Lesson 5-1: Light and Quantized Energy Day 38 Ch. 5 - Electrons in Atoms

9. Ch. 5 – Electrons in Atoms 17ChlorineYellow-green gas, very reactive, toxic

10. Ch. 5 – Electrons in Atoms 17ChlorineYellow-green gas, very reactive, toxic 18ArgonGas, safe, nonreactive

11. Ch. 5 – Electrons in Atoms 17ChlorineYellow-green gas, very reactive, toxic 18ArgonGas, safe, nonreactive 19PotassiumMetal, so reactive that it’s explosive in air

12. A. Waves  Wavelength ( ) - length of one complete wave. Unit is m or nm (10 -9 m)  Frequency ( ) - # of waves that pass a point during a certain time period hertz (Hz) = 1/s or s -1  Amplitude (A) - distance from the origin to the trough or crest

13. A. Waves

14. C. Johannesson A. Waves A

15. A. Waves

16. B. EM Spectrum LOWENERGYLOWENERGY HIGHENERGYHIGHENERGY ROYG.BIV redorangeyellowgreenblueindigoviolet

17. C. Johannesson

18. B. EM Spectrum  Frequency & wavelength are inversely proportional c = c:speed of light (3.00  10 8 m/s) :wavelength (m, nm, etc.) :frequency (Hz)

19. B. EM Spectrum GIVEN: = ? = 434 nm = 4.34  10 -7 m c = 3.00  10 8 m/s WORK : = c = 3.00  10 8 m/s 4.34  10 -7 m = 6.91  10 14 Hz  EX: Find the frequency of a photon with a wavelength of 434 nm.

20. B. EM Spectrum GIVEN: = 3.44 x 10 9 Hz = ? c = 3.00  10 8 m/s WORK : = c = 3.00  10 8 m/s 3.44  10 9 s -1 = 8.72  10 -2 m Find the wavelength of a microwave with a frequency of 3.44 x 10 9 Hz.

21. C. Quantum Theory GIVEN: E = ? = 4.57  10 14 Hz h = 6.6262  10 -34 J·s WORK : E = h E = ( 6.6262  10 -34 J·s ) ( 4.57  10 14 Hz ) E = 3.03  10 -19 J zEX: Find the energy of a red photon with a frequency of 4.57  10 14 Hz.

22. C. Quantum Theory GIVEN: E = ? = 3.00 x 10 12 Hz h = 6.6262  10 -34 J·s WORK : E = h E = ( 6.6262  10 -34 J·s ) ( 3.00  10 12 Hz ) E = 1.99  10 -21 J zEX: Find the energy of a photon with a frequency of 3.00  10 12 Hz.