1. IIIIII Periodic Trends Ch. 5 - The Periodic Table

2. A. Periodic Law zWhen elements are arranged in order of increasing atomic #, elements with similar properties appear at regular intervals.

3. B. Chemical Reactivity zFamilies ySimilar valence e - within a group result in similar chemical properties

4. B. Chemical Reactivity zAlkali Metals zAlkaline Earth Metals zTransition Metals zHalogens zNoble Gases

5. zAtomic Radius ysize of atom © 1998 LOGAL zFirst Ionization Energy yEnergy required to remove one e - from a neutral atom. © 1998 LOGAL zMelting/Boiling Point C. Other Properties

6. zAtomic Radius D. Atomic Radius Li Ar Ne K Na

7. zAtomic Radius yIncreases to the LEFT and DOWN D. Atomic Radius

8. zWhy larger going down? yHigher energy levels have larger orbitals yShielding - core e - block the attraction between the nucleus and the valence e - zWhy smaller to the right? yIncreased nuclear charge without additional shielding pulls e - in tighter D. Atomic Radius

9. Electronegativity zThe tendency of an atom to attract electrons to form ionic bonds.

10. zElectronegativity Trend zIncreases up and to the right.

11. zFirst Ionization Energy E. Ionization Energy K Na Li Ar Ne He

12. zFirst Ionization Energy yIncreases UP and to the RIGHT E. Ionization Energy

13. zWhy opposite of atomic radius? yIn small atoms, e - are close to the nucleus where the attraction is stronger zWhy small jumps within each group? yStable e - configurations don’t want to lose e - E. Ionization Energy

14. zSuccessive Ionization Energies yMg1st I.E.736 kJ 2nd I.E.1,445 kJ Core e - 3rd I.E.7,730 kJ yLarge jump in I.E. occurs when a CORE e - is removed. E. Ionization Energy

15. yAl1st I.E.577 kJ 2nd I.E.1,815 kJ 3rd I.E.2,740 kJ Core e - 4th I.E.11,600 kJ zSuccessive Ionization Energies yLarge jump in I.E. occurs when a CORE e - is removed. E. Ionization Energy

16. zMelting/Boiling Point yHighest in the middle of a period. F. Melting/Boiling Point

17. zIonic Radius yCations (+) xlose e - xsmaller © 2002 Prentice-Hall, Inc. yAnions (–) xgain e - xlarger G. Ionic Radius

18. zWhich atom has the larger radius? yBe orBa yCa orBr Ba Ca Examples

19. zWhich atom has the higher 1st I.E.? yNorBi yBa orNe N Ne Examples

20. zWhich atom has the higher melting/boiling point? yLiorC yCrorKr C Cr Examples

21. zWhich particle has the larger radius? ySorS 2- yAlorAl 3+ S 2- Al Examples