1. Chemical Periodicity

2. Atomic Size Size increases as you go down in any column
Size decreases from left to right in any row

4. Ionic Size C+2 > C+4 F-1 > F
Size increases as total charge decreases
C+2 > C+4
F-1 > F

6. Rank the elements from their atomic number from smallest to largest
9, 55, 13, 11, & 1

7. Ionization Energy
The energy required to remove electrons from atoms or ions

8. 1st Ionization Energy Decreases as you go down any column
Increases from left to right on any row
Fr <<<<<<<<<<<<<He

11. Shielding Effect
The further away an electron is from the nucleus, the more electron clouds lie between the electron & the nucleus

12. Drill:
Arrange the following atoms from lowest to highest 1st ionization energies:
2, 20, 14, 55, 7

13. Review HW
Problems:
40 – 42 & 57 – 64
on pages 170 & 171

14. Ionization Energies
2nd > 1st
3rd > 2nd
Massive increase when a shell is emptied

16. Electron Affinity
The attraction of electrons by an atom

17. Electron Affinity Decreases as you go down any column
Increases from left to right across any row
Fr <<<<<<<<<<<< F

19. The attraction of shared pairs of electrons by an atom
Electronegativity
The attraction of shared pairs of electrons by an atom

20. Electronegativity Decreases as you go down any column
Increases from left to right across any row
Fr <<<<<<<<<<<< F

22. Metallic Character Increases as you go down any column
Decreases from left to right across any row

24. Reactivity Metals 1A > 2A > 3A Metals increase down
Nonmetals increase as you get closer to F

25. Metal Oxides When dissolved in water, make basic solutions
Sometimes called basic anhydrides
MgO, Na2O, etc

26. Non-metal Oxides When dissolved in water, make acidic solutions
Sometimes called acid anhydrides
CO2, SO2, SO3, NO2

27. Metal Hydrides Metals bonded to H
When dissolved in water, make basic solutions
NaH, MgH2, AlH3, etc

28. Non-metal Hydrides Non-metals bonded to H
When dissolved in water, make acidic solutions
HCl, H2S, HBr, etc
Exception: NH3

29. Place the following elements in largest to smallest order with respect to: 1) diameter 2) 1st ionization energy 3) electronegativity 4) metalic character
Elements #: 1,5, 8, 15, 56

30. Identify as ionic, covalent, or metallic bonds
Na-Cl Fe-Cr
S-Cl H-Cl
Mg-S C-C
N-O Fe-Fe