Molecular CompoundsSNC2DI

Terms to Know• A covalent bond is formed when

elements share electrons to make a bond.

• A molecular compound is formed from covalent bonding atoms

• Typically form between two non-metals

H

How Covalent Bonds Form

C

H

H

H

Formulas for Molecular Compounds1. Use the exact same rules for ionic

compounds.2. If the compound is already named, then

all you need to do is look at the prefixes and write the compound accordingly.

C Cl4 1

CCl4

Examples:Carbon DioxideCO2

Tertraphosphorus dichloride

P4Cl2

Naming Molecular Compounds• Change ending of second non-metal

to “ide”• Use prefixes to identify the number of

atoms– mono, di, tri, tetra, penta.– Don’t use mono for the first non-metal

CCl4 carbon tetrachloride

More Examplesnitrogen monoxide NO

silicon dioxide SiO2

carbon monoxide CO

sulfur trioxide SO3

phosphorus pentabromide

PBr5

dinitrogen trioxide N2O3

Homework• Read 5.11• Define words in bold• P. 204 Q. 1-8

Created by Carl Fusco