1. Covalent Bonding

2.  Atoms that share a pair of electrons are joined together by a covalent bond.  A neutral particle that is composed of atoms joined together by covalent bonds is called a molecule.  Substances that are composed of molecules are called molecular compounds

3.  Most molecular compounds are compose of two or more non-metallic elements.  The atoms of these elements share electrons to obtain the same number of electrons as the closest noble gas.

4. Lewis Diagrams for covalent bonds

5. Multiple Bonds  Sometimes, atoms share more than one electron pair between them. Some atoms can form double or even triple covalent bonds. For example, carbon dioxide, where two atoms of oxygen bond with a single atom of carbon

6.  Diatomic molecules are molecules made up of two of the same elements. Only a few of the elements have the capacity to do this  Copy Table 1 pg 202 into your notebooks

7. Naming binary molecular compounds  These combine through covalent bonds  The elements, except for Hydrogen are written in order of increasing group number  Will end with “ide”  The number of atoms of a given type is designated by a prefix:  Mono – 1 2-di, 3-tri, 4-tetra, 5- penta, 6-hexa, 7-hepta, 8 – octa, 9-nona, 10 -deca

8.  The only exception to the prefixes is the first element has only one atom we don’t use “mono”