1. Periodic Trends

2. CA Standards Students know how to use the periodic table to identify trends in ionization energy, electronegativity, and the relative sizes of ions and atoms.

4. Increased effective nuclear charge due to decreased shielding

5. Radius increases down a group

7. Period Trend:Atomic Radius

9. As radius decreases across a period, the electron you are removing is closer to the nucleus and harder to remove

10. Tends to decrease down a group

13. As radius decreases, electrons get closer to the bonding atom’s nucleus

14. Electronegativity tends to decrease down a group or remain the same

16. Periodic Trend:Electronegativity

17. Summary of Periodic Trends

19. Table of Ion Sizes