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A pure substance is either an element or compound. Elements are composed of only one kind of atom, and compounds are composed of a definite proportion of atoms of different elements that is always the same.

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Is every sample of matter substance?

Every sample of matter is not a substance because a matter may include multiple substances. A substance contains only one kind of matter.


What is a sample of matter either a single element or a single compound?

a pure substance! ;)


Sample of matter that has the same composition and properties throughout?

term for that is pure substance


Why is matter a pure substance?

Matter is a pure substance if it can only be separated by chemical means, NOT physical means. This could be a compound or an element. The opposite is a mixture which can be separated/broken into smaller parts by physical means.


What is a sample of a matter either single element or a single compound that has a definite chemical and physical properties?

a pure substance. :)


What is a sample if matter that has the same composition and properties throughout what?

"A phase is a state of a...system that has...uniform chemical composition and physical properties.""Matter." Wikipedia. 19 Feb 2008, 04:16 UTC. Wikimedia Foundation, Inc. 19 Feb 2008 .


What purpose is is served when water is used instead of a sample substance?

For example to establish a zero point for an instrument or to make a measurement on water considered as a pure sample.


What is a pure sample of atoms that are all the same known as?

a element is a pure substance


What is one characteristic of a sample of matter that indicates it is a pure substance?

A pure substance is a material which contains atoms of only one kind. It has fixed physical and chemical properties like boiling point, melting point, valency, density.


Is matter a pure substance and a mixture?

yes matter can be both pure substances and mixtures


Is o2 a pure substance?

yes, oxygen is an example of a pure substance.a pure substance is made up of one kind of matter and it cannot be broken down into smaller parts.


Why is sugar a substance?

Sugar is a pure substance because everything in a sample is alike: a molecule of sugar.