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Year 9 Chemistry > Elements,compounds And Mixtures Booklet > Flashcards

Elements,compounds And Mixtures Booklet Flashcards

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1
Q

What is an element?

A

Materials that cannot be split up into anything simpler by chemical methods. Contain only one type of atom

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2
Q

What is an atom?

A

Simplest particle of an element that can exist on its own

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3
Q

What is a molecule?

A

2 or more atoms joined together (may be same or different)

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4
Q

How many elements are there approximately ?

A

100

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5
Q

What are elements represented by?

A

Symbol e.g. Oxygen is symbolised with an “O”

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6
Q

What is shown on the left hand side of the periodic table?

A

Metals

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7
Q

What is shown on the right hand side of the periodic table?

A

Non-metals

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8
Q

Which of the following are conductors of electricity and which are not?

  • Aluminium
  • Zinc
  • Copper
  • Iron
  • Carbon
  • Sulfur
A 
Aluminium - conductor
Zinc - conductor
Copper - conductor 
Iron - conductor
Carbon - conductor
Sulfur - insulator
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9
Q

Which of the following are shiny and which are not?

  • Aluminium
  • Zinc
  • Copper
  • Carbon
  • Sulfur
A 
Aluminium - shiny
Zinc - shiny
Copper - shiny
Carbon - not shiny
Sulfur - not shiny
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10
Q

Which of the following have high densitys and which of the following have low densitys?

  • Iron
  • Carbon
  • Sulfur
  • Lead
A

Iron - high
Carbon - low
Sulfur - low
Lead - high

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11
Q

Which of the following is hard and which of the following is brittle?

  • Iron
  • Sulfur
A

Iron - hard

Sulfur - brittle

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12
Q

Which of the following has a high melting point and which of the following has slow melting point?

  • Iron
  • Sulfur
A

Iron - high

Sulfur - low

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13
Q

Which of the following is malleable and which of the following is not malleable?

  • Iron
  • Sulfur
A

Iron - malleable

Sulfur - not malleable

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14
Q

Which of the following is metals and which of the following is non-metals?

  • Aluminium
  • Zinc
  • Copper
  • Carbon
  • Sulfur
  • lead
  • iron
A 
Aluminium - metal
Zinc - metal
Copper - metal
Carbon - non-metal
Sulfur - non-metal 
lead - metal
iron - metal
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15
Q

What are the properties of metallic elements?

A
  • good electricity and heat conductors
  • shiny solids
  • high melting/boiling points
  • all solid at room temperature (except Mercury)
  • malleable and ductile
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16
Q

What are the properties of non-metallic elements?

A
  • poor electricity and heat conductors
  • dull
  • low melting/boiling points
  • gas, solid or liquid at room temperature
  • soft and brittle
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17
Q

What is a compound?

A

Material made up of two or more different elements chemically joined together

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18
Q

Give two example of compounds

A

Water and carbon dioxide

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19
Q

If a compound has 1 or more elements in it, what does the phrase usually end in?

A

-ide

E.g. Iron sulfide (iron and sulfur)

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20
Q

If a compound has 1 or more elements, and water, what does the phrase usually end in?

A

-ate

E.g. Copper sulfate (copper,Sulfur and oxygen)

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21
Q

Which elements make up magnesium oxide?

A

Magnesium and oxygen

22
Q

How do you make magnesium oxide?

A

Burn magnesium in air

23
Q

What do you observe during the magnesium oxide experiment?

A

Bright white light

24
Q

What does magnesium oxide look like?

A

White ash

25
Q

What is the word equation for magnesium oxide?

A

Magnesium + oxygen -> magnesium oxide

26
Q

Which elements make up iron sulfide?

A

Iron and sulfur

27
Q

How do you make iron sulfide?

A

Heat mixture of iron and sulfur

28
Q

What do you observe during the iron sulfide experiment?

A

Mixture glows

29
Q

What does iron sulfide look like?

A

Black solid

30
Q

What is the word equation for iron sulfide?

A

Iron + sulfur -> iron sulfide

31
Q

What is a mixture?

A

Two or more substances mixed together that are easy to separate

32
Q

What do compounds have completely different from the elements that are used to make them?

A

Completely different properties

33
Q

What is the appearance of iron?

A

Grey, shiny solid

34
Q

What is the appearance of sulfur?

A

Yellow, dull powder

35
Q

What is the appearance of iron-sulfur mixture?

A

Grey and yellow flecks

36
Q

What is the appearance of iron sulfide?

A

Dark, grey solid (not shiny)

37
Q

Which of the following are magnetic or non- magnetic?

  • iron
  • sulfur
  • iron-sulfur mixture
  • iron sulfide
A

Iron - magnetic
Sulfur - non-magnetic
Iron-sulfur mixture - iron(magnetic) sulfur(non-magnetic)
Iron sulfide - non-magnetic

38
Q

Which of the following are soluble or insoluble in Xylene?

  • iron
  • sulfur
  • iron-sulfur mixture
  • iron sulfide
A

iron - insoluble
sulfur - soluble
iron-sulfur mixture - iron(^^^) sulfur(^^^)
iron sulfide - insoluble

39
Q

What are observations of the following elements when added to acid?

  • iron
  • sulfur
  • iron-sulfur mixture
  • iron sulfide
A

iron - bubbles
sulfur - no reaction
iron-sulfur mixture - bubbles
iron sulfide - rotten egg smell

40
Q

Different elements have…

A

Different properties

41
Q

In a mixuture, what way do elements behave?

A

As if they were on their own

42
Q

What word do scientists use when they talk about the world around us?

A

Material e.g. The wood in a tree

43
Q

What does malleable mean?

A

Can be bent into shape

44
Q

What is the state of water and what elements are present?

A
  • Liquid

- hydrogen and oxygen

45
Q

What is the state of carbon dioxide and what are the elements present?

A
  • gas

- carbon and oxygen

46
Q

What is the state of sodium chloride and what are the elements present?

A
  • solid

- sodium and chlorine

47
Q

What is the state of hydrogen?

A

Gas

48
Q

What is the state of oxygen?

A

Gas

49
Q

What is the state of carbon?

A

Gas

50
Q

What is the state of sodium?

A

Solid

51
Q

What is the state of chlorine?

A

Gas

Year 9 Chemistry (4 decks)

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