3. Electromagnetic Spectrum

4. Atomic Emission Spectrum

5. Continuous Spectrum

6. Glowing Metal

7. Photoelectric Effect

8. Click On Picture

9. Bohr Model (review) Only works for hydrogen atoms Electrons don’t move in circles The energy was right, but not because e - circle like planets

10. The Hydrogen Spectrum

11. The Bohr Ring Atom n = 3 n = 4 n = 2 n = 1

12. Quantum Mechanical Model Louis de Broglie - 1924 –Matter could move like a wave –Like standing waves –The vibrations of a stringed instrument

13. Schrödinger Equation

14. Quantum Numbers A set of 4 “numbers” that describe an electron Tell us –Energy level –Shape of orbital –Orientation of orbital around nucleus –Spin

15. Principal quantum number Principal quantum number (n) –Energy level of the electron –7 energy levels –Correspond to 7 periods (rows) of periodic table

16. Angular Momemtum Quantum Number Energy levels are divided into sublevels called orbitals An ORBITAL is a region in space where there is a high probability of finding an electron

17. Orbitals Denoted by the letters s, p, d, and f Each orbital can hold 1 or 2 electrons only!

18. S orbitals l = 0 1 orbital per energy level

19. P orbitals 3 orbitals per energy level

20. P orbitals l = 1 3 orbitals per energy level

21. D orbitals l = 2 5 orbitals per energy level

22. F Orbitals l = 3 7 orbitals per energy level

23. Magnetic Quantum Number  Magnetic quantum number (m I )  Gives the axis orientation  Tells direction in each shape (x,y,z)

24. Spin Quantum Number Describes the direction the electron is spinning.

25. Spin Quantum Number Describes the direction the electron is spinning.

28. Electron Configuration We follow 3 rules to get the correct electron configuration for each atom 1.Aufbau Principle 2.Pauli exclusion Principle 3.Hund’s Rule

29. Energy Levels in atoms SublevelsOrbitals

30. Energy Levels in atoms SublevelsOrbitals