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

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

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.

Section 6-3 Ionization Energy (cont.)

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

PART 5 WHAT ALL THINGS WANT

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

How can atoms get there?

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

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

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)

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

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?

NOTES ON LAST SLIDE

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!

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

Alkali metals are so reactive because: