Composition of Matter

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Example: Carbon Dioxide (CO2).

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What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. Example: Saltwater.

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components can be seen and are not uniform throughout. Example: Salad.

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What is a pure substance?

Back

A pure substance is a material that has a constant composition and properties throughout. Example: Hydrogen (H2).

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Example: Aluminium (Al).

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What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Example: Air.

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What is the difference between a compound and a mixture?

Back

A compound is made of two or more elements chemically bonded, while a mixture is made of two or more substances physically combined.

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What is the particle theory of matter?

Back

The particle theory of matter states that all matter is made up of tiny particles that are in constant motion.

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What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.

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What is a solution?

Back

A solution is a homogeneous mixture where one substance is dissolved in another. Example: Sugar dissolved in water.