 Obj:  You will be able to describe the types of chemical bonds & how they form.  Do Now: In your own words, define a bond?  Please take out pH Lab.  HW: Test Review Packet Due Tuesday (11/10)  Test Wed. (11/11)

Chemical Bonds

Chemical Bond Def: a force that holds together atoms in a molecule or compound –Forms by the losing, gaining, or sharing of electrons! Form to make atoms stable (outer shell is full) Types –Ionic –Covalent –Hydrogen

Ionic Bonding Def: Opposite ions are attracted to each other to form a bond

IonicIonic Bonding Ion = atom with a charge (+ or -) An example of this type of bonding: salt (NaCl) This type of boning occurs between metals (left) & nonmetals (right).

CovalentCovalent Bond Def: sharing of Electrons to form a bond Stronger than ionic bonding

Covalent Bond 2 Types: –NONPOLAR  equal sharing of electrons Example – Oil –POLAR  unequal sharing of electrons Example - Water

Water Chemical Formula: H 2 O Draw an atom model of water.

Like Dissolves Like Polar molecules and ions all dissolve together Nonpolar molecules all dissolve together do notPolar and nonpolar molecules do not mix together

Covalent bonds NonpolarPolar ∂+∂+ ∂-∂- Ionic bond + - Chemical bonds