Elements, Compounds, Mixtures

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What is a compound?

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A compound is a substance formed when two or more elements are chemically bonded together. Example: NaHCO3 (sodium bicarbonate).

Tags

NGSS.MS-PS1-1

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Example: A salad with different vegetables.

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What is an element?

Back

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

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What is a pure substance?

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A pure substance is a material made of only one type of particle, which can be either an element or a compound.

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How can you identify a mixture?

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A mixture can be identified by the presence of two or more different substances that retain their individual properties.

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What happens when you add raspberries to a bowl of blueberries?

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You create a mixture, as both fruits are physically combined but not chemically bonded.

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What is the difference between a compound and a mixture?

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

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Can a mixture be separated into its components?

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Yes, mixtures can be separated by physical methods such as filtration, evaporation, or sorting.

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What does it mean for substances to be physically combined?

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Physically combined substances retain their individual properties and can be separated without chemical reactions.

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What is an example of a compound?

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Water (H2O) is an example of a compound, made of hydrogen and oxygen atoms chemically bonded.

Tags

NGSS.MS-PS1-1