Topic 4 - Obtaining And Usining Metals

Question 0

What types of metals aren’t found in compounds?

Answer 0

Un reactive metals

Question 1

How are most metals found?

Answer 1

In a compound

Question 2

What is a metal ore?

Answer 2

A compound containing enough metal to make it worthwhile extracting.

Question 3

Are we ever going to run out of metal ores?

Answer 3

Yes, they are a finite source.

Question 4

What types of metals are hard to extract?

Answer 4

reactive metals

Question 6

What is an oxidation?

Answer 6

when you add oxygen to something

Question 6

What does the most common type of reduction use to separate the oxygen from the metal?

Answer 6

Carbon

Question 7

What is reduction?

Answer 7

when you remove oxygen from something

Question 8

List the metals in the reactivity series from most to least

Answer 8

Potassium.       Please 
Sodium.           Send
Calcium.           Charlie's 
Magnesium.     Monkeys
Aluminium.        And
Zinc.                  Zebras
Iron.                   In 
Lead.                 Lead
Copper.             Cages

Question 9

Where is carbon in the reactivity series?

Answer 9

Below aluminium and above zinc

Question 10

How do you extract a metal from its ore that is less reactive than carbon?

Answer 10

You heat the ore with carbon

Question 11

How do you extract the metal that is more reactive than carbon?

Answer 11

Electrolysis

Question 12

Which reduction method is more expensive?

Answer 12

Electrolysis

Question 13

What can you do to make a metal stronger?

Answer 13

Covert it into an alloy

Question 14

What is an alloy?

Answer 14

A mixture of two or more metals, or a mixture or a metal and a non-metal.

Question 15

Why are alloys harder than pure metals?

Answer 15

Because they have different sized atoms. So when an element such as carbon is added to pure iron, the smaller carbon atom will upset the layers of pure atoms, making it more difficult for them to slide over each other.

Question 16

Give an example of an alloy

Answer 16

Steel. Mixture of iron and carbon.

Gold alloys because pure gold it too soft so metals such as zinc, copper and nickel are used to harden it.

Question 17

What is a smart alloy?

Answer 17

An alloy that remembers its original shape.

Question 18

Give an example of a smart alloy

Answer 18

Nitinol, a mixture of nickel and titanium.

Question 19

Why is it important to recycle metals?

Answer 19

So we don’t run out of them because they are a finite source.

Question 21

What are the advantages of recycling?

Answer 21

It uses less resources
It uses less energy
It uses less money
It makes less rubbish

Question 22

What are the properties of metals?

Answer 22

They are strong
They conduct heat and electricity well
They are malleable

Question 23

What is aluminium used to make and why?

Answer 23

Window frames, electricity cables, and aircraft.

Because it has a low density and corrosion resistant, it also conducts, and forms strong hard alloys.

Question 24

What is copper used for and why?

Answer 24

Electrical wires, pipes (plumbing). Because it is hard strong and has a high melting point, very un-reactive.

Question 25

What s gold used for and why?

Answer 25

Jewellery, tooth fillings, and electric circuits. Because it is shiny and extremely easy to shape.

Question 26

Why do some metals corrode?

Answer 26

The metal is being oxidised, metals which are high in the reactivity series are more likely to corrode because they react easily with oxygen.