Properties Of Metals

Question 1

List 2 properties of metals which makes them good conductors

Answer 1

Strong and bendy

Question 2

What are the properties of copper?

Answer 2

Copper is a good conductor of electricity and ideal for drawing out electrical wires because it is STRONG and BENDY
It also does not react with water

Question 3

What are the properties of Aluminium?

Answer 3

It is corrosion-resistant and has a low density

Pure aluminium isn’t particularly strong but it forms hard alloys

Question 4

What are be properties of Titanium?

Answer 4

It is also a low density metal and unlike aluminium it is VERY STRONG
It is also corrosion-resistant

Question 5

What is metal fatigue?

Answer 5

When stresses and strains or placed upon metals repeatedly over time and can lead to the metal breaking (very dangerous in planes - aluminium)

Question 6

Why are alloys harder than pure metals?

Answer 6

Alloys contain smaller elements along with the bigger sized elements, which disrupt the layers making it harder for them to slide over each other

Question 7

Why does pure iron need to be changed into alloys and what is the alloy called?

Answer 7

Pure iron needs to be changed into alloys because it is far too bendy, soft and brittle for other uses.
It needs to be changed into a STEEL ~ an alloy

Question 8

What is bronze used to make?

Answer 8

It is used to make medals and statues

Question 9

What is Cupronickel (copper + nickel) used to make?

Answer 9

This is used to make silver coins, as it is hard and corrosive-resistant

Question 10

What are gold alloys used to make?

Answer 10

They are used to make jewellery, as pure gold is too soft for this use
~ metals (e.g. zinc, copper and silver are used to harden the gold)

Question 11

What do aluminium alloys make?

Answer 11

This makes aircraft

~ Aluminium has a low density, but it’s alloyed with small amounts of other metals which make it stronger

Question 12

What are the properties and uses of Low carbon steel?

Answer 12

Properties: easily shaped
Uses: car bodies

Question 13

What are the properties and uses of High carbon steel?

Answer 13

Properties: very hard and inflexible
Uses: blades for cutting tools, bridges

Question 14

What are the properties and uses of stainless steel?

Answer 14

Properties: corrosion-resistant
Uses: cutlery, containers for corrosive substances

Question 15

What is copper good for and why?

Answer 15

• plumbing ~ because it can be bent to make pipes and is below hydrogen in the reactivity series so doesn’t react with water.

Question 16

What is aluminium good for and why?

Answer 16

• building an aeroplane ~ It is strong and can be bent into shape (when alloyed)
  It is also light

Question 17

What is titanium good for and why?

Answer 17

• replacement hips ~ it doesn’t corrode when it comes in contact with water
  It is also light and not too bendy

Question 18

Why do metals need to be protected when in contact with air and water?

Answer 18

Metals need to be protected (i.e pained) when it contact with air or water incase if the corrode, they lose their strength and hardness