Covalent Bonding

Molecular Compounds

Molecules and Molecular Compounds

• Covalent bond– Atoms held together by sharing electrons

• Molecule– A neutral group of atoms joined together

by covalent bonds

• Diatomic molecule– A molecule consisting of two atoms of the

same element– H2, N2, O2, F2, Cl2, Br2, I2

• Molecular compound– A compound composed of molecules– A covalent compound– Formed between 2 nonmetals or a

nonmetal and a metalloid

• Properties of molecular compounds– Relatively lower melting and boiling

points than ionic compounds–Many are gases or liquids at room

temperature– Do not conduct electricity

Ionic & Molecular Compounds

Ionic Compound Molecular Compound

Molecular Formulas

• Chemical formula of a molecular compound

• Shows how many atoms of each element a molecule contains

• Does not indicate the structure of a molecule

• Assignment– Page 216 #1-6– Page 247 #39-41