2. PART 4 PERIODIC TRENDS: IONIZATION ENERGY or… BREAKING THE SPRING!!!

3. Section 6-3 Ionization energy is defined as the energy required toIonization energy

4. Think of ionization energy as a measure of how ____________ an atom’s nucleus holds onto its electrons. A low ionization energy indicates that the atom has a ____________ hold on its electrons – and vice versa.

5. Section 6-3 Ionization Energy (cont.)

6. Does the group trend for ionization energy make sense? Does the period trend for ionization energy make sense?

7. PART 5 WHAT ALL THINGS WANT

8. Back to the question: why are alkali metals so reactive? Consider: what do all thing in the physical universe want?

9. How can atoms get there?

10. The Noble Gases have ______________ ________________ for any element in their period.

11. Therefore: all other elements are noble gas “Wannabee’s!”

12. OCTET RULE Atoms tend to gain, lose, or share electrons to acquire a full set of _______ valence electrons. ________ IS GREAT! (except those close to helium, like _____________ & _____________ who only want ______ electrons)

13. PART 6 - REACTIVITY OF METALS Can you explain the cartoon below?

14. Do metals have high or low ionization energies? Will it be easier for metals to gain or lose electrons to attain a noble gas configuration?

15. NOTES ON LAST SLIDE

16. METALS REACT BY ______________ELECTRONS!! The lower the ionization energy, the __________ it is for a metal to lose electron(s), and the ______________ reactive the metal is!

17. SO – WHY ARE ALKALI METALS THE MOST REACTIVE METALS ON THE PERIODIC TABLE?

18. Alkali metals are so reactive because: