metals and alloys Flashcards
1
Q
alloy definition
A
a mixture of two or more elements one of which is ALWAYS a metal
2
Q
alloys are stronger than metals… why?
A
In metals the atoms are arranged tightly in rows which can slide over each other easily, making the metal SOFT. Alloys add new atoms that disrupt the rows so the metal gets stronger.
It also gets less dense as new atoms have been added.
3
Q
Three examples of alloys:
A
Brass
Bronze
Steel
4
Q
Aluminium is used to make
A
Airplanes
5
Q
Copper is used to make
A
Copper wires
Copper pipes
6
Q
Low carbon steel is used to make
A
Building materials
Bridges
7
Q
High carbon steel is used to make
A
Cutting/manufacturing tools eg drill bits
8
Q
Stainless steel is used to make
A
Cutlery
Cookware
9
Q
Aluminium is good for airplanes because it has a
A
Low density
