Step-by-step explanation:
Pure substances are elements and compounds. These substances have the following properties:
- All parts are the same throughout which implies that they are homogeneous.
- They have a definite composition.
- They cannot be easily separated or broken down into simpler substances by physical means
- Separation by physical means is not possible
- They have unique sets of physical properties.
Heterogeneous mixtures have completely opposite properties as the pure substances as given above.