Classification of Matter Review

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and carbon (C).

Tags

NGSS.MS-PS1-1

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).

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. Mixtures can be homogeneous or heterogeneous.

Front

Define homogeneous mixture.

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. An example is saltwater.

Front

Define heterogeneous mixture.

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A heterogeneous mixture is a mixture where the components are not uniformly distributed. An example is a salad.

Front

What distinguishes a compound from a mixture?

Back

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

Front

Is water an element or a compound?

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Water is a compound, as it is made up of two hydrogen atoms and one oxygen atom (H2O).

Tags

NGSS.MS-PS1-1

Front

What is the particle diagram of a compound like?

Back

The particle diagram of a compound shows different types of atoms bonded together in a fixed ratio.

Tags

NGSS.MS-PS1-1

Front

What is the particle diagram of an element like?

Back

The particle diagram of an element shows only one type of atom, indicating it is a pure substance.

Tags

NGSS.MS-PS1-1

Front

What is an example of a heterogeneous mixture?

Back

An example of a heterogeneous mixture is a mixture of sand and iron filings.