Metallic Bonding Flashcards
1
Q
Definition of metallic bond
A
- electrostatic attraction between the delocalised electrons and the rows of positive metal ions (cations)
2
Q
Are metals a conductor?
A
YES
- as solids and molten
- Delocalised electrons can flow
- movement of elections also means energy can be transferred quickly through material, so good conductors of heat
3
Q
Do metals has a high to low melting point?
A
HIGH
- strong metallic bond
- require lots of energy to break
4
Q
Are pure metals hard or soft?
A
Malleable + Ductile
- atoms are all the same size
- therefore layers of atoms can slide easily over each other when a force is applied
5
Q
What are alloys
A
- mixture of metals / metals with carbon
6
Q
why are alloys harder when force is applied?
A
- different sized atoms of metals/carbon
- stops layers of atoms sliding over each other so easily
7
Q
Steel is a alloy of what
A
Iron
Iron+carbon
