1. Periodic Properties Cartoon courtesy of NearingZero.net

2. The Periodic Table Period Group or family Period Group or Family

3. Periodic Trends in Atomic Radius Radius ________________________________ Increased effective nuclear charge due to decreased shielding Radius ________________________________ Addition of principal quantum levels Determination of Atomic Radius:

4. Table of Atomic Radii

5. Increases for successive electrons taken from the same atom Tends to ______________________________ Electrons in the same quantum level do not shield as effectively as electrons in inner levels Irregularities at half filled and filled sublevels due to extra repulsion of electrons paired in orbitals, making them easier to remove Tends _______________________________ Outer electrons are farther from the nucleus Ionization Energy - _____________________________________ ____________________________________ Ionization Energy - _____________________________________ ____________________________________

6. Table of 1 st Ionization Energies

7. Ionization of Magnesium Mg + ______________  Mg + + e - Mg + + _____________  Mg 2+ + e - Mg 2+ + _____________  Mg 3+ + e -

8. Another Way to Look at Ionization Energy

9. Electronegativity A measure of the __________________________ _________________________________________ Electronegativities tend to _____________ _____________________________________ Electronegativities tend to _____________ ____________________________________

10. Periodic Table of Electronegativities

11. Summation of Periodic Trends