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Chemistry unit 3 > Metals > Flashcards

Metals Flashcards

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1
Q

Can metals conduct heat

A

Yes, all metals conduct heat as their electrons are delocalised

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2
Q

What is an alloy

A

When metals are mixed with other metals(or carbon ) to change their properties.

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3
Q

Examples of alloys

A

Steel – iron & carbon (increase strength)
Stainless steel – iron, chromium & nickel (resists rusting)
Solder – lead & tin (melts at low temperature)

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4
Q

Name metals from most reactive to least reactive

A 
Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium 
Zinc
Iron
Tin 
Copper
Mercury 
Silver
Gold
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5
Q

Equation: metal reacting with oxygen

A

Metal +oxygen—> metal oxide

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6
Q

What metals react with oxygen?

A

All metals but mercury,silver and gold

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7
Q

What metals react with acids?

A

All metals above copper

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8
Q

Equation:metal reacting with acid

A

Metal+acid—>salt + hydrogen

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9
Q

Equation:metal reacting with water

A

Metal + water —> metal hydroxide + hydrogen

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10
Q

What metals react with water?

A

Potassium, sodium, lithium, calcium and magnesium

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11
Q

Three different ways to seperate metals from their ores?

A

Electrolysis (using electricity
Heat and carbon
Heat alone

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12
Q

What metals get extracted from heat alone?

A

Gold
Silver
Mercury

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13
Q

What metals get extracted using heat and carbon?

A 
Copper
Lead
Tin
Iron
Zinc
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14
Q

What metals get extracted using electrolysis?

A 
Potassium
sodium
lithium
Calcium
Magnesium
Aluminium
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15
Q

Electrons in a electrochemical series always…

A

Electrons ALWAYS flow from a metal HIGHER in the series to a metal LOWER

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16
Q

The further apart metals are in the series….

A

The higher voltage produced

17
Q

From where to where does the flow of charged particles go

A

Through the wire from mg to cu

18
Q

What happenes when ion concentration in the electrolyte is high?

A

Higher voltage is produced

19
Q

What is used to join to half cells?

A

An ion bridge, ions move across the bridge.

20
Q

What is a cell?

A

A battery

21
Q

What happens when pairs of metals are connected together with an electrolyte?

A

an electric current will flow.

22
Q

What is a electrolyte?

A
  • ionic solution which completes the circuit

- Ions in the electrolyte which flow through the solution between the metals

23
Q

What is oxidation?

A

Loss of electrons

24
Q

What is reduction?

A

Gain of electrons

25
Q

Example of reduction

A

Copper ions

  • Metal ions turn into atoms by GAINING electrons
  • Copper is being REDUCED.
26
Q

Example of oxidation?

A

Zinc atoms

  • Metal atoms turn into ions by LOSING electrons
  • Zinc is being OXIDISED
27
Q

What is redox?

A

When oxidation and reduction happen at the same time?

28
Q

What is electrolysis?

A

breaking up of an ionic compound using electricity

Chemistry unit 3 (4 decks)

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