A substance that is composed of only one kind of matter is called an element. The smallest particle of an element is called an atom.
A mineral
Homogeneous matter
Matter with only one particular kind of atom is known as an element. These atoms can either be located individually or combined into larger units. An example of this would be the notion that carbon is an element, because at it's pure substance state it's composed of only carbon atoms.
Matter also may composed of one element only as Coal, Graphite and Diamond are only Carbon.
Elemental matter.
A pure substance contains only one kind of matter. It cannot be separated into other substances by physical means.
Elements are matter made of one kind of atom.elements
An element is composed of only one kind of atom. A compound is composed of atoms of more than one element.
Material made up of only one kind of matter is called an Element
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Elements.
All matter, such as solids, liquids and gases, is composed of atoms. Any material that is composed of only one type of atom is called a chemical element.