1. The Periodic Table Topic 1.5

2. Color this onto your Coloring Book
Color this onto your Coloring Book. The colors do not have to match the slide. The 3 “blues” are supposed to be three different shades. Title it : “Family Names”

3. Atomic Size / Radius

4. Coulombic Attraction Page 11 in your notes
Across a Period atoms have the same number of principle energy levels. As the number of protons and valence electrons increase, so does the attraction resulting in a smaller radius.
3 P
4 P
5 P
6 P
Boron
Carbon
Lithium
Berylium
Rings = 2
Protons = 6
Valance e- = 4
Rings = 2
Protons = 5
Valance e- = 3
Rings = 2
Protons = 3
Valance e- = 1
Rings = 2
Protons = 4
Valance e- = 2

5. Down a Period Page 12 in your notes
Lithium
Down a Period the number principle energy levels increases, thus increasing the atomic radius.
Rings = 2
Protons = 3
Valance e- = 1
11 P
Sodium
Rings = 3
Protons = 11
Valance e- = 1
11 P
Potassium
Rings = 4
Protons = 19
Valance e- = 1

7. Atomic Size Periodic Trend

8. Sizes of Ions
Cations are always smaller than the atoms which they form.
Anions are always larger than the atoms from which they form.

9. Trends in Ionic Size

10. Ionization Energy
The energy required to remove an electron from an atom.

12. Trends in First Ionization Energy

13. Electronegativity The ability of an atom to attract electrons.
These values are derived from ionization energy and follow the same trend.

14. Electronegativity

15. Electronegativity

16. 1. Circle which element has the larger atomic radius:
Choice 1
Choice 2 K Br Na Mg Fr F Li Cs I

17. Circle which element has the larger Ionization Energy:
Choice 1
Choice 2 K Br Na Mg Fr F Li Cs I

18. Circle which element has the larger Electronegativity:
Choice 1
Choice 2 K Br Na Mg Fr F Li Cs I

19. Circle which element or ion has a larger radius:
Choice 1
Choice 2 Na
Na+ Mg
Mg+2 Cl
Cl-1
O 2- O