Answer:
Pure substance
Explanation:
A material that consists of only one type of element or compound is regarded as a pure substance.
A pure substance has the following properties;
- All the parts are the same throughout i.e. they are homogenous
- They have a definite composition.
- They cannot easily be separated or broken down into simpler substances by physical means.
- Separation by physical methods is not easy
- They have unique sets of properties.
Compounds and elements are pure substances too.
