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Chemistry - U4 > Particles Topic 1 > Flashcards

Particles Topic 1 Flashcards

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1
Q

What materials can diffuse?

A

Gasses and liquids

Less dense materials diffuse faster

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2
Q

What is a solution

A

A homogeneous mixture of a solid (or gas) in a liquid

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3
Q

What is a suspension

A

A heterogeneous mixture of a solid in a liquid

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4
Q

Homogeneous

A

A mixture which has uniform composition and properties throughout

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5
Q

Heterogeneous

A

A mixture that does NOT have uniform composition and properties throughout

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6
Q

What is a emulsion

A

A heterogeneous mixture of two (or more) liquids

Eg. Oil and water

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7
Q

What is a mist

A

Minute droplets of a liquid in a gas

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8
Q

What is smoke

A

Minute droplets of a solid on a gas

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9
Q

What is an alloy

A

A mixture of two or metals and non-metals

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10
Q

What is a gel

A

A heterogeneous mixture of a liquid within a solid

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11
Q

What is a meringue

A

A heterogeneous mixture of a gas within a solid

Eg a sponge

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12
Q

What is a foam

A

A mass of small bubbles of gas in a liquid

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13
Q

Define an element

A

A simple substance that cannot be broken down into a simpler substance by chemical means (1 type of atom)

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14
Q

Define a compound

A

A substance that contains 2 or more elements that have been chemically combined

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15
Q

Define a mixture

A

Two or more elements/compounds that are not chemically joined, but mixed

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16
Q

What do you call liquids that mix with each other completely (eg milk and tea)

A

Miscible

17
Q

What do you call liquids that, when combined, form layers (eg oil and vinegar)

A

Immiscible

18
Q

When using filtration, what is residue?

A

The insoluble liquid left in the filter

19
Q

When using filtration, what is the filtrate

A

The liquid that passes through the filter

20
Q

Gasses can be compressed because …

A

Their molecules have large spaces between them

21
Q

What happens during freezing

A

Particles become more regularly arranged

22
Q

What is sublimation

A

Solid —> gas

23
Q

What is distillation?

A

The action of purifying a liquid through the process of heating and cooling

24
Q

What is diffusion

A

Diffusion is the net movement of particles form areas of high concentration to areas of low concentration until a uniform concentration is achieved

Chemistry - U4 (2 decks)

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