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

Elements,compounds And Mixtures Booklet Flashcards

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?

25
What is the word equation for magnesium oxide?
Magnesium + oxygen -> magnesium oxide
26
Which elements make up iron sulfide?
Iron and sulfur
27
How do you make iron sulfide?
Heat mixture of iron and sulfur
28
What do you observe during the iron sulfide experiment?
Mixture glows
29
What does iron sulfide look like?
Black solid
30
What is the word equation for iron sulfide?
Iron + sulfur -> iron sulfide
31
What is a mixture?
Two or more substances mixed together that are easy to separate
32
What do compounds have completely different from the elements that are used to make them?
Completely different properties
33
What is the appearance of iron?
Grey, shiny solid
34
What is the appearance of sulfur?
Yellow, dull powder
35
What is the appearance of iron-sulfur mixture?
Grey and yellow flecks
36
What is the appearance of iron sulfide?
Dark, grey solid (not shiny)
37
Which of the following are magnetic or non- magnetic? - iron - sulfur - iron-sulfur mixture - iron sulfide
Iron - magnetic Sulfur - non-magnetic Iron-sulfur mixture - iron(magnetic) sulfur(non-magnetic) Iron sulfide - non-magnetic
38
Which of the following are soluble or insoluble in Xylene? - iron - sulfur - iron-sulfur mixture - iron sulfide
iron - insoluble sulfur - soluble iron-sulfur mixture - iron(^^^) sulfur(^^^) iron sulfide - insoluble
39
What are observations of the following elements when added to acid? - iron - sulfur - iron-sulfur mixture - iron sulfide
iron - bubbles sulfur - no reaction iron-sulfur mixture - bubbles iron sulfide - rotten egg smell
40
Different elements have...
Different properties
41
In a mixuture, what way do elements behave?
As if they were on their own
42
What word do scientists use when they talk about the world around us?
Material e.g. The wood in a tree
43
What does malleable mean?
Can be bent into shape
44
What is the state of water and what elements are present?
- Liquid | - hydrogen and oxygen
45
What is the state of carbon dioxide and what are the elements present?
- gas | - carbon and oxygen
46
What is the state of sodium chloride and what are the elements present?
- solid | - sodium and chlorine
47
What is the state of hydrogen?
Gas
48
What is the state of oxygen?
Gas
49
What is the state of carbon?
Gas
50
What is the state of sodium?
Solid
51
What is the state of chlorine?
Gas

Year 9 Chemistry (4 decks)

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