Molecules and Compounds

• Molecules are the smallest unit of a compound that retains the characteristics of the compound.

• Molecules are compounds that are a combination of two or more elements in definite ratios by mass.
• The character of each element is lost when forming a compound.
• Chemical compounds are composed of two or more elements.
• Same or different
• The composition of molecules is given by a molecular formula.
• Example
• A water molecular formula is H2O.