1
Q
Why do metals conduct heat and electricity?
A
Because they have delocalised electrons in their structures
2
Q
Why can metals be bent and shaped?
A
As the layers of atoms can slide over eachother
3
Q
What are alloys?
A
Mixtures of metals, made from 2 or more metals
4
Q
Why are alloys harder than pure metals?
A
As the different sized atoms of the metals distort the layers, making it more difficult for them to slide over eachother
5
Q
What can shape memory alloys do?
A
Return to their original shape after being deformed
6
Q
When in Nitinol (a shape memory alloy) used?
A
In dental braces
Chemistry Unit 2
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