1. TOPIC: Ionic Bonding
Do Now: Which terms are used to identify pure substances?
A. an element and a mixture
B. an element and a compound
C. a solution and a mixture
D. An mixture and a compound

2. Ionic: Metal + Nonmetal
Metals: lose valence electrons
form cation (+ ion)
Nonmetals: gain electrons
form anion (- ion)
Ionic: cation (+ ion) + anion (- ion)

3. IONIC BONDING Involves transfer of electrons
Electrons Lost by Metal = Electrons Gained by Nonmetal
Ions are formed (cation +)(anion -)

5. Review: Metals are losers!
Na configuration 2-8-1
Ne configuration 2-8
Na loses 1 electron → Na+1
Na+1 configuration is 2-8! (Ne)
What will take the valence electron from Na??
Na metal 
A nonmetal

6. Review: Nonmetals are winners!
Cl configuration 2-8-7
Ar configuration 2-8-8
Cl gains 1 electron → Cl-1
Cl-1 has the configuration 2-8-8! (Ar)
What will donate an electron to Cl ??
Cl2 (g) 
A metal

7. electron transferred from Na to Cl

8. NOTE: the elements have very different physical properties than the compound they form

9. Since Ionic Compounds need + ion and – ion to form, they can actually contain more than one nonmetal or even be formed from all nonmetals if they have something called a polyatomic ion Turn to table E in your ref table
K2SO4
NH4Cl
NH4NO3

10. Polyatomic ions -They are NOT neutral, they have a charge (either + or -) - they are covalently bonded (made of nonmetals only)
SO NH PO OH-