atoms, elements, molecules and compounds vocabulary

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What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

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What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

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What is a molecule?

Back

A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

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What is a compound?

Back

A substance formed when two or more different elements are chemically bonded together.

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What is a homogeneous mixture?

Back

A mixture that has a uniform composition and appearance throughout.

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What is a heterogeneous mixture?

Back

A mixture that consists of visibly different substances or phases.

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What are pure substances?

Back

Materials that have a constant composition and consistent properties throughout.

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What is the difference between an element and a compound?

Back

An element is made of one type of atom, while a compound is made of two or more different types of atoms.

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What is a solution?

Back

A homogeneous mixture where one substance (solute) is dissolved in another (solvent).

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What is the significance of chemical bonds in compounds?

Back

Chemical bonds hold the atoms together in a compound, determining its properties.