Chemical Bonding

Chapter VI: Chemical Bonding
10/29/09

NOTES:
Ionic bonding- chemical bonding that results from the electrical attraction between cations and ations

Covalent bonding- bonds that result from sharing of electron pairs between two atoms

• Nonpolar Covalent Bond- two atoms of same size bond
• Polar Covalent Bond- an atom bonds with an atom of a different size

Percentage Ionic Character-

• To find, subtract the electronegativity of two elements, then find the difference on the percentage ionic character.
• If 0-.3, then it's nonpolar covalent
• If .4-1.7, then it's polar covalent
• if 1.8-3.3, then it's ionic

Molecular Compounds

• a molecule is a neutral group of atoms that are held togethor by covalent bonds
• a chemical compound whose simplest units are molecules is a molecular compound
• the composition of compound is given by its chemical formula
• a chemical formula indicates the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts.
• a molecular formula shows the types and numbers of atoms combined in a single molecule of a molecular compound

Extra notes: Chapter 5 Test will be on Tuesday, November 3rd; The Chapter 5 outline will be due on the day of the test, Tuesday. Have a good afternoon.