1. In a compound, there is chemical union between the elements, while there is no chemical reaction or bonding between elements in a mixture.
2. The compositions of a compound are fixed, while the compositions of a mixture are variable.
3. The components of a compound do not retain their individual properties, while the components of a mixture retain their individual properties.
4. To separate the components of a compound would need large inputs of energy, while the components of a mixture can be separated easily.
5. A compound can be created through chemical reaction, while a mixture can be created through mechanical means.