Chemical Bonds

 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
Ionic 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).
Covalent 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
• Chemical Formula: H2O
• Draw an atom model of water.
Like Dissolves Like
• Polar molecules and ions all
dissolve together
• Nonpolar molecules all
dissolve together
• Polar and nonpolar
molecules do not mix
Covalent bonds
Ionic bond
Chemical bonds