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Chemistry Class. > Classification of Matter > Flashcards

Classification of Matter Flashcards

1
Q

What is a pure substance?

A

Matter that has a uniform and unchanging composition.

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2
Q

What are the two types of pure substance?

A

Elements and compounds.

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3
Q

What are elements also called?

A

Atoms.

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4
Q

What are elements made up of?

A

A single type of atom.

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5
Q

What do the squares on the periodic table represent?

A

The different types of atoms.

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6
Q

What are elements?

A

Elements are substances that can’t be broken down or changed into other simpler substances by chemical means.

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7
Q

What are examples of elements?

A

Iron, carbon, oxygen.

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8
Q

What is a compound made up of?

A

A compound is made up of 2 or more atoms by chemical means together.

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9
Q

How can compounds be broken down?

A

They can only be broken down by chemical means.

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10
Q

What are molecules?

A

More than one atom bonded together.

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11
Q

What 2 substances can molecules be?

A

Elements or compounds.

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12
Q

What is a mixture?

A

A physical blend of two or more pure substance mixed together.

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13
Q

How can mixtures be separated?

A

They can be separated by physical means.

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14
Q

What are some examples of compounds?

A

Water, salt, and sugar

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15
Q

What are some separations methods for mixtures?

A

Distillation, filtration, crystallization, chromatography, and more.

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16
Q

What are two types of mixtures?

A

Homogeneous and heterogenous.

17
Q

What is a homogenous mixture?

A

A mixture that has a uniform composition throughout.

18
Q

In a homogenous mixture can you see a change in composition?

A

No, you can’t see a change in composition using the naked eye.

19
Q

What are some examples of homogenous mixtures?

A

Air, coffee, brass, and more

20
Q

What is a heterogeneous mixture?

A

A mixture that has no uniform compsition.

21
Q

Can you see changes in composition when it comes to a heterogeneous mixture?

A

Yes, you can see a change in composition using the naked eye.

22
Q

What are some examples of heterogenous mixtures?

A

Cereal, sand, trail mix, and more.

Chemistry Class. (10 decks)

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