Matter and Change Vocab Terms

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The smallest unit of an element that keeps the element's chemical properties

A group of atoms held together by chemical forces

A substance that cannot be broken down into simpler substances by chemical or physical means

A physical combination of two or more substances

Matter that has a fixed composition and definite properties

A substance made up of atoms of two or more different elements

The temperature at which a substance changes from a solid to a liquid

Characteristics that can be observed without changing the identity of the substance