Question

difference between pure substance and a mixture

Answer 1

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.
_______________
OR
_______________
Matter is anything that has mass and that occupies space. Matter can be either a pure substance or a mixture. 

Pure substance: Matter that has the same composition and properties throughout is called a substance. 

Mixture: It is the combination of two or more pure substances where each substance retains its own identity.
______________
I hope this helps you if yes then please mark as brainliest answer. Thanks for giving me the opportunity to help you with the answer. Have a marvelous day ahead dear.

Answer 2

Pure substance: 1. Matter that has the same composition and properties throughout is called a substance.
2. A pure substance has only one component
3. Eg: Pure water is a pure substance. It consist of only water molecules.

Mixture:1. It is the combination of two or more pure substances where each substance retains its own identity.
2. Elements and compounds are both pure substances.
3. It is collection of dissimilar
particles that will not undergo a chemical reaction.