Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

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What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the individual substances are evenly distributed and not easily distinguishable.

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the individual substances are not evenly distributed and can be easily distinguished.

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What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

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What is a molecule?

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A molecule is a group of two or more atoms bonded together.

Front

What is the atomic symbol?

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The atomic symbol is a one or two-letter notation used to represent an element.