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A substance is a form of matter that has a constant chemical composition and characteristic properties. It cannot be separated into its several components without breaking its chemical bonds.
Water, gold, table salt and sugar are all substances.

Chemical substance - Wikipedia

en.wikipedia.org/wiki/Chemical_substance

A chemical substance is a form of matter that has constant chemical composition and ... A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydro...

What Is a Pure Substance? (Chemistry Definition)

chemistry.about.com/od/chemistryglossary/g/Pure-Substance-Definition.htm

This is the definition of pure substance along with examples of things that are pure substances (and ones that aren't).

What Is a Pure Substance? - Chemistry - About.com

chemistry.about.com/od/moleculescompounds/f/What-Is-A-Pure-Substance.htm

You may have wondered what is meant by the term 'pure substance'. Here's what a pure substance is and how you can tell if something is pure or not.

Pure Substance in Chemistry: Definition, Properties & Examples ...

study.com/academy/lesson/pure-substance-in-chemistry-definition-properties-examples.html

May 3, 2015 ... This lesson introduces the concept of the pure substance. The impact of purity on the physical and chemical properties are discussed and ...

What is a pure substance in science? | Reference.com

www.reference.com/science/pure-substance-science-9745a6a9b7b16cb5

A pure substance is any single type of material that has not been contaminated by another substance. Water is considered a pure substance if the water contains  ...

How to Distinguish Pure Substances and Mixtures - dummies

www.dummies.com/education/science/chemistry/how-to-distinguish-pure-substances-and-mixtures/

Chemists can classify matter as solid, liquid, or gas. But there are other ways to classify matter, as well — such as pure substances and mixtures. Classification is  ...

What is a pure substance? - Chemistry for kids

www.chemistryforkids.net/mixtures/what-is-a-pure-substance

A pure substance is a substance that cannot be separated by physical means. eg . filtration, evaporation, distillation or chromatography. Examples of pure ...

www.ask.com/youtube?q=Pure Substance&v=Ze0kG4yeFS0
Apr 21, 2014 ... A basic introduction to pure substances. ... PC101 #002 How to Express a Pure Substance in Numbers? (Phase Diagram of a One Component ...

Pure Substances Examples - SoftSchools

www.softschools.com/examples/science/pure_substances_examples/476/

A pure substance is any single type of material that are made of only one type of atom or only one type of molecule. Also, a pure substance can be defined as ...