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GCSE Chemistry Revision > C2 - Bitezise Flashcards > Flashcards

C2 - Bitezise Flashcards

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1
Q

Give the arrangement of particles in a solid

A

Very close
Regular pattern
Vibrate around a fixed position
Low energy

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2
Q

Bitesize
Describe the arrangement of particles in a liquid

A

Close
Randomly arranged
Move around each other
greater energy

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3
Q

Bitesize
Solids have a ___ shape and cannot ___

A

Solids have a fixed c=shape and cannot flow

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4
Q

Bitesize
Can solids be compressed?

A

No

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5
Q

Bitesize
Liquids __- and take the shape of their ____

A

Liquids flow and take the shape of their container

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6
Q

Bitesize
Can liquids be compressed?

A

No

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7
Q

Bitesize
Gases flow and completely ___ their container

A

Fill

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8
Q

Bitesize
Gases ___ be compressed

A

Can

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9
Q

What is the name from going to a solid to a gas immediately

Give an example of something that can do that

A

Sublimation
Solid cO2

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10
Q

What is the gain of energy used for in state change

A

Overcome forces of attraction/break bonds

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11
Q

Energy is transferred to/from a substance when a substance freezes

A

From a substance - to the surroundings

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12
Q

Give 2 limitations of the particle model

A

Particles are not solid
Many atoms are not spherical

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13
Q

Nano particles have very large ___ to ___ ratios

A

Surface area
Volume

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14
Q

Give 4 uses of nanoparticles

A

Medical treatments
Cosmetics/deodorants
Electronics
Catalysts

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15
Q

What nano particle type is used in sunscreens?

A

Zinc oxide - as it blocks ultraviolet light and is invisible on the skin

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16
Q

Give 2 disadvantages of nano particle sunscreen

A

Clumping together to make them hard to apply
As they are invisible =, you can’t tell where it is applied

17
Q

What property of nano particles makes them good catalysts

A

They have large surface area to volume ratios

18
Q

How are nano particles used on window panes?

A

Self cleaning window panes have nanopartc8lare coatings which catalyse the breakdown of dirt in teh presence of sunlight

19
Q

Give 3 possible risks of nano particles

A

They could be breathed in or
pass into cell and catalyse harmful reactions and they
Could bind to toxic chemicals and then get into our bodies

20
Q

Suggest a risk of using silver nanoparticles to dress wounds

A

Could harm useful bacteria (when thrown away)

21
Q

What are nanopartciles?

A

Particles between 1 and 100 nm in size

GCSE Chemistry Revision (13 decks)

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