Metals

Question 1

What elements are these alloys formed from?

Carbon steel 
Stainless steel 
Bronze 
Brass
Magnaliam 
Duralumin

Answer 1

Carbon steel : carbon + iron

Stainless steel: iron + chromium + nickel

Bronze: copper + tin

Brass: copper + zinc

Magnaliam: magnesium + aluminium

Duralumin: aluminium + copper + magnesium + manganese

Question 2

Explain why metals are malleable

Answer 2

• metal ions
• arranged in layers in a regular structure
• layers are able to slide over one another

Question 3

Give a use of mild steel

Less malleable and softer than high carbon steel

Answer 3

Bridges/ making car bodies / pylons / roofs

Question 4

Suggest a use of high carbon steel (less malleable and harder than mild steel)

Answer 4

• knives/ drills/ razor blades

Question 5

Suggest a reason why alloys are less malleable

Answer 5

The atoms in the structure are of different sizes

So reduce movement (prevents sliding)