Molecules 3.3

Molecules They can have the same atoms or different atoms

Molecular Compound

Types of Covalent Bonds Each line(s) in a pair of shared electrons Types of Covalent Bonds Each line(s) in a pair of shared electrons. More bonds = stronger bonds

Octet Rule Each atom has 8 valence electrons

Exceptions to the Octet Rule

Hydrogen (exception) Only has a 1s orbital

Helium (exception) Only has a 1s orbital

Lithium (exception) Only has a 1s and 2s orbitals

Beryllium (exception) It only has 1s and 2s orbitals

Ionic Compounds

Exothermic Reactions

Exothermic Reaction graphed

Endothermic Reactions

Endothermic Reactions graphed

Bond Length Energies It is about Optimal distance