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Z: GCSE Chemistry > C2 > Flashcards

C2 Flashcards

1
Q

What type of bonding occurs between two non-metals (sharing)?

A

Covalent

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2
Q

What type of bonding occurs between one non-metal and one metal (stealing)?

A

Ionic (Non-metal steals)

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3
Q

What type of bonding occurs between two metals (shedding)?

A

Metallic

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4
Q

What is the difference between oxidation and reduction (OILRIG)?

A

Oxidation is the loss of electrons, reduction is the gaining of electrons

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5
Q

What is a delocalised electron?

A

An electron that is not attached to an atom

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6
Q

What is an alloy?

A

A mixture of two or more metals with different properties

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7
Q

What are allotropes?

A

Giant molecules made up of one element but arranged in different ways

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8
Q

Name some examples of common polymers

A

Plastic bags (polyethene), plastic bottles/containers (PET)

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9
Q

What is the RAM/Ar of carbon (top number on periodic table)?

A

12 (.001)

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10
Q

What does Mr mean?

A

Relative molecular mass

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11
Q

What is chromatography?

A

Separating a mixture of compounds based on their ability to bind to the stationary phase whilst being carried by the mobile phase (can be used for separating colours in different pens)

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12
Q

What is the empirical formula?

A

The simplest ratio of different atoms in a substance

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13
Q

How do you work out percentage yield?

A

Actual yield / predicted yield x 100

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14
Q

How do you work out the mass of an element?

A

Mass = Moles x Mr

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15
Q

What two things does the rate of a reaction depend on?

A

Frequency of collisions; energy transferred during collisions

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16
Q

Why does the rate of reaction increase when the surface area of a solid increases?

A

Because there are more particles for the liquid particles to collide with

17
Q

Name some signs of a chemical reaction

A

Colour change; light; gas produced; temperature change

18
Q

What is the difference between an exothermic and an endothermic reaction?

A 
Exothermic: Temperature increases
Energy given out
Bonds forming
Endothermic: Temperature decreases
Energy taken in
Bonds breaking
19
Q

What is a salt?

A

An ionic compound produced when an acid reacts with another substance

Z: GCSE Chemistry (1 decks)

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