1. Do Now  Write down anything about which you are unclear for the following topics:  Atomic Theory  Nuclear Chemistry  Electron configurations

2. Unit 2 Review Day Williamsburg High School for Architecture and Design Mr. Quinn and Ms. Tom 11/7/13

3. Aim  How is the atom constructed?

4. Atomic Theory Overview  Plum Pudding Model  Electrons  Rutherford Model  Nucleus  Bohr Model  Orbits  Wave Mechanical Model  Orbitals

5. Check Yo’ Self, Part 1  What particles are located inside the nucleus?  What is the sign of the charge of a nucleus?  What is the charge of a proton?  What is the mass of a proton and neutron?  What is the sign of a charge on an electron?

6. The Nucleus: an Overview  Atomic Number  Atomic mass  Isotopes  Nomenclature  Number of protons  Number of protons + neutrons  Same protons, different neutrons

7. Check Yo’ Self, Part 2  How many electrons, protons, and neutrons does a Kr-85 atom have?  Which isotopic notation represents an atom of carbon-14? 1. 6 8 C 2. 8 6 C 3. 6 14 C 4. 14 6 C

8. Nuclear Chemistry  Half-Life  Definition  Equation  Nuclear Decay Equations  The time for half of a radioactive sample to decay

9. Check Yo’ Self, Part 3  If an object has decayed for 3 half-lives, what fraction of the original remains?  Balance the following nuclear decay equation:  _________________ → 4 2 He + 206 82 Pb

10. Electron Configurations  Bohr Model: shells  Wave Mechanical model: orbitals

11. Check Yo’ Self, Part 4 Part 1  A bromine atom in an excited state could have an electron configuration of 1. 2-8-18-6 2. 2-8-18-7 3. 2-8-17-7 4. 2-8-17-8  Identify 2 gases in the mixture

12. Check Yo’ Self, Part 4 Part 2  Write the electron configuration for phosphorus in the ground state using orbital and electron spin notation.

13. Now, it’s your turn!