2. o Ionic bonding results from electrostatic attractions among ions, which are formed by the transfer of one or more electrons from one atom to another. o Covalent bonding results from sharing one or more electron pairs between two atoms. o Metallic bonding results in a sea of electrons between two cations o http://www.picsearch.com/info.cgi?q=ionic%20bon ds&id=IHgxbdtO5lawBR9zy6jqpq1E_2Jt6okckgQ mu4NAeQI http://www.picsearch.com/info.cgi?q=ionic%20bon ds&id=IHgxbdtO5lawBR9zy6jqpq1E_2Jt6okckgQ mu4NAeQI

3.  Covalent bonds are formed when atoms share electrons.  Two nonmetals  If the atoms share 2 electrons a single covalent bond is formed.  If the atoms share 4 electrons a double covalent bond is formed.  If the atoms share 6 electrons a triple covalent bond is formed.

4.  Lower melting and boiling points  Molecules don’t interact much  Gases or liquids at room temp  Don’t conduct electricity  No ions so no charges  Flexible  Molecules move around

5.  Two elements  Use prefixes to tell how many atoms of each element are present  Example: Carbon Dioxide CO 2 Mono is never used for the first element

6. NumberPrefix 1mono 2di 3tri 4tetra 5penta 6hexa 7hepta 8octa 9nona 10deca

7.  The prefixes simply tell you the subscript for each element  Example: dinitrogen tetroxide N 2 O 4 Mono (1 is not written) Drop the vowel ending of the prefix if the prefix ends in a vowel and the element begins with a vowel.