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Year 9 Chemistry > Elements, Compounds and Mixtures > Flashcards

Elements, Compounds and Mixtures Flashcards

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1
Q

What is an element?

A

Elements are materials that cannot be split up into anything simpler by chemical methods. They contain only one type of atom.

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2
Q

What is an atom?

A

An atom is the simplest particle of an element that can exist on its own.

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3
Q

What is a molecule?

A

Molecules consist of two or more atoms joined together.

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4
Q

Where does the periodic table split into two sections and what are they?

A

The periodic table splits after Al, Ge, Sb and Pe.

On the left there are the metals, on the right there are non-metals.

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5
Q

Are the following elements conductors or insulators?

Aluminium, Zinc, Copper, Iron, Carbon, Sulfur

A 
Aluminium-conductor
Zinc-conductor
Copper-conductor
Iron-conductor
Carbon-conductor
Sulfur-insulator
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6
Q

Are the following elements shiny or dull?

Copper, Zinc, Aluminium, Carbon, Sulfur

A 
Copper-shiny
Zinc-shiny
Aluminium-shiny
Carbon-dull
Sulfur-dull
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7
Q

Do the following elements have high or low density?

Lead, Iron, Sulfur, Carbon

A

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

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8
Q

Are the following elements hard or brittle?

Iron, Sulfur

A

Iron-hard

Sulfur-brittle

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9
Q

Are the following elements malleable or not malleable?

Lead, Sulfur

A

Lead-malleable

Sulfur-not malleable

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10
Q

Do the following elements have high or low melting points?

Iron, Sulfur

A

Iron-high (1538)

Sulfur-low (133)

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11
Q

Properties of metallic elements:

A
  • good conductors of electricity
  • shiny solids
  • have high melting points
  • malleable and ductile
  • room temperature (except Mercury)
  • good conductors of heat
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12
Q

Properties of non-metallic elements:

A
  • poor conductors of electricity
  • usually dull
  • have low melting points
  • can be a gas, liquid at room temperature or solid
  • soft and brittle
  • poor conductors of heat
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13
Q

What is a compound?

A

A compound is a material that is made up of two or more different elements that are chemically joined together.

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14
Q

If you have ONE metal and ONE non metal you change the ending of the ___ _____ to ___.

A

Non metal

IDE

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15
Q

If you have ONE metal and TOW non metals change the ending to ___.

A

ATE

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16
Q

Which elements make up magnesium oxide?

A

Magnesium

Oxygen

17
Q

How do you make magnesium oxide?

A

Burn magnesium in air

18
Q

What do you observe during the experiment?

A

It turns to a bright white light

19
Q

What is the word equation for the magnesium oxide reaction?

A

Magnesium+oxygen->magnesium oxide+hydrogen

20
Q

Which elements make up iron selfide?

A

Iron

Sulfur

21
Q

How do you make iron sulfide?

A

Heat a mix of iron and sulfur

22
Q

What does iron sulfide look like?

A

A dark grey solid

23
Q

What is the word equation for the iron sulfide reaction?

A

Iron+sulfur->iron sulfide

24
Q

What is a mixture?

A

A mixture is two or more substances mixed together which are easy to separate.

25
Q

What is the appearance of the following materials?

Iron, Sulfur, Iron-Sulfur mixture, Iron Sulfide

A

Iron-Shiny, grey, solid
Sulfur-Yellow, dull, solid
Iron-Sulfur mixture-Mix of first two
Iron Sulfide-Black, dull, solid

26
Q

Are the following elements magnetic or non-magnetic?

Iron, Sulfur, Iron-Sulfur mixture, Iron Sulfide

A

Iron-magnetic
Sulfur-non-magnetic
Iron-Sulfur mixture-magnetic
Iron Sulfide-non-magnetic

27
Q

Are the following soluble or insoluble in Xylene?

Iron, Sulfur, Iron-Sulfur mixture, Iron Sulfide

A

Iron-Insoluble
Sulfur-Soluble
Iron-Sulfur mixture- Iron-Insoluble Sulfur-Soluble
Iron Sulfide- Iron-Insoluble Sulfur-Soluble

28
Q

How do the following elements react in acid?

Iron, Sulfur, Iron-Sulfur mixture, Iron Sulfide

A

Iron-reacts, bubbles, smells
Sulfur-no reaction
Iron-Sulfur mixture-iron reacts sulfur doesn’t
Iron Sulfide-bubbles and smells

Year 9 Chemistry (2 decks)

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