Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Nat 5 Chemistry > 3.1 Metals > Flashcards

3.1 Metals Flashcards

1
Q

What are the properties of metallic bonding?

A
  • Electrostatic force of attraction between positively charged ions and delocalised electrons
  • High melting amd boiling points
  • Always conductive
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Why do metals conduct electricity?

A

Because they contain delocalised electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does malleable mean?

A

Able to be hammered or pressed into shape without breaking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does ductile mean?

A

Able to be drawn into a thin wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How is the method of extraction of a metal determined?

A

It’s position on the reactivity series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a native metal?

A

A metal that is so unreactive they can be found uncombined in nature in large amounts (e.g. gold and platinum)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where is a native metal on the reactivity series?

A

Right at the bottom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which elements can be extracted by heat alone?

A

Elements below copper on the reactivity series (gold, silver and mercury)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does extraction by heat alone mean?

A

The metal will separate from its ore when heated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which elements can be extracted by heating with carbon/carbon monoxide?

A

The elements between copper and zinc (inclusive) on the reactivity series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does extraction by heating with carbon/carbon monoxide mean?

A

The element will separate from its ore when heated with carbon/carbon monoxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How is iron extracted from its ore?

A

In a blast furnace, which keeps the temperature above 2000°C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which metals require electrolysis to extract from their ores?

A

Metals above zinc in the reactivity series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is electrolysis?

A

The decomposition of an ionic compound into its elements using electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens during electrolysis?

A

Positive ions gain electrons at the negative electrode and negative ions lose electrons at the positive electrode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is reduction?

A

Reduction Is Gain of electrons by a reactant in any reaction (the way they appear on the electrochemical series)

17
Q

What is oxidisation?

A

Oxidisation Is Loss of electrons by a reactant in any reaction (the reverse of the way they appear on the electrochemical series)

18
Q

What is a redox reaction?

A

A reaction where reduction and oxidisation take place at the same time

19
Q

What do metals and non metals do in ionic compounds?

A

Metals lose electrons to form positive ions
Non metals gain electrons to form negative ions

20
Q

Metal+oxygen makes…

A

Metal oxide

21
Q

Metal+water makes…

A

Metal hydroxide+hydrogen

22
Q

Metal+dilute acid makes…

A

Salt+oxygen

23
Q

What is the reactivity series

A

An arrangement of metals created by ordering them in terms of reactivity (the rate at which they react)

24
Q

How do you create a redox reaction?

A

By combining the separate reduction and oxidation reaction so the electrons cancel out

25
Q

Which way around are reactions written in the table?

A

Reduction (flip the top one in the redox equation)

26
Q

What happens when the metals are extracted from their ores?

A

The metal ions are reduced to form metal atoms

27
Q

What is electrolysis?

A

The decomposition of an ionic compound into its components using electricity

28
Q

What happens during electrolysis?

A

A D.C. current must be used
Positive ions gain electrons at the negative electrons
Negative ions lose electrons at the positive electrode

29
Q

What is corrosion?

A

The deterioration of a metal when it is exposed to water and oxygen

30
Q

What is rusting?

A

The corrosion of iron

31
Q

What is ferroxyl indicator?

A

An indicator that turns from yellow to blue in the presence of iron ions

32
Q

What are different forms of protection against rusting?

A
  • Painting
  • Coating with oil or grease
  • Metal plating (when plated with zinc this is called galvanising
  • Dehumidification
  • Sacrificial protection
  • Attatching to the negative terminal of a power source
33
Q
A

Nat 5 Chemistry (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions