2. Benchmark 1 Review

3. Alkali Metals 1 Alkaline Earth Metals 2 Groups 13 – 16 3, 4, 5 and 6 Halogens 7 Noble Gases 8 (except He has 2)

4. Where are the anions on the periodic table? Nonmetals (right side of metalloids) Where are the cations on the periodic table? Metals (left side of metalloids)

5. Atomic Radii down a group Increases Atomic Radii across a period Decreases Largest Atoms are found in…. The lower left hand corner of the periodic table

6. Ionization Energy down a group Decreases Ionization Energy across a period Increases Largest Ionization energy is found in…. The upper right hand corner of the periodic table

7. Electronegativity down a group Decreases Electronegativity across a period Increases Largest electronegativity is found in…. The upper right hand corner of the periodic table Element with the Highest electronegativity F

8. Reacts with water Forms +1 cations 1 valence electron Highly reactive Family with largest atomic radii Family with lowest ionization energy and electronegativity

9. Forms +2 cations 2 valence electrons Highly reactive Family with 2 nd largest atomic radii Family with 2 nd lowest ionization energy and electronegativity

10. Form -1 anions 7 valence electron Family with 2 nd smallest atomic radii Highest electronegativity, All halogens exist as diatomic molecules F 2, Cl 2, Br 2, I 2, At 2

11. Do not form ions 8 valence electrons except He Family with smallest atomic radii No Electronegativity High Ionization Energy All gases Inert

12. Name the blocks on the periodic table

13. Draw the Bohr Diagram for Mg

14. How many protons? Neutrons? Electrons? 56, 80 and 56 How many valence electrons? 2 What is the electron configuration? 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2

15. Loss of an  -particle (a helium nucleus) He 4242 U 238 92  U 234 90 He 4242 +

16. Loss of a  -particle (a high energy electron)  0−10−1 e 0−10−1 or I 131 53 Xe 131 54  + e 0−10−1