What is meant by a substance?

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A substance is a matter having specific composition and properties. It includes each pure element or compound. All matter in nature can be classified either as a substance or a mixture. Examples of substances include –

Water molecule
Oxygen element

Types of Substances

Pure substances are classified into two forms – elements and compounds.

Elements are composed of just a type of atom, either by itself or bonded together forming a molecule.
Compounds are molecules formed of two simpler substances.

Substances Classification

Properties of substance

Some of the properties of substances are –

A pure substance has a definite mass and volume.
It is formed of just one state of matter.
A substance is made up of atoms or molecules.

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