1. Unit Two Review Periodic Table, e- configuration, Noble Gas configuration, p.e.n., orbital-filling diagrams, Lewis dot diagrams, periods and groups/families

2. e- configuration/Noble Gas configuration  Determine the e- configuration and Noble Gas configuration for the following:  As  W

3. Answers  As 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 3 [Ar] 4s 2 3d 10 4p 3  W 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 1 4f 14 5d 5 [Xe] 6s 1 4f 14 5d 5

4. Valence electrons/Lewis dot diagrams  N  Cu  Kr

5. Answers. 5 valence. N :. Cu. 1 valence.. : Kr : 8 valence (full octet)..

6. Orbital-filling diagrams  O  Ca

7. Answers  O __ __ __ __ __ 1s 2s 2p  Ca __ __ __ __ __ __ 1s 2s 2p 3s __ __ __ __ 3p 4s

8. p.e.n.  Fe - 56  Cl -36  Pb - 207

9. Answers  Fe p = 26 e = 26 n = 30  Cl p =17 e = 17 n = 19  Pb p = 82 e = 82 n = 125

10. What else do I need to study?  Creator of the first Periodic Table  Parts of the atom, groups/families, periods and blocks of the P.T. (You will NOT be using your colored periodic tables!)  Hund’s Rule, Pauli Exclusion and Aufbau Principles, Stability Pyramid, what are the favorable elements, nuclear reactions and to balance them, definition of isotope