3.3 metallic bonding Flashcards
What is metallic bonding?
Metallic bonding is the electrostatic force of attraction between the metal positive ions and the delocalised electrons.
Structure of metallically bonded substances:
A giant metallic lattice of positively charged metal ions surrounded by a ‘sea’ of delocalised electrons.
What are the properties of metallically bonded substances?
- Good conductors of electricity and heat
- Very strong
- They are malleable and ductile
- Have high melting points
- Insoluble
Why are they good conductors of heat and electricity?
The ‘sea’ of delocalised electrons can carry a flow of charge.
How are they malleable?
The layers of positive metal ions are able to slide over one another.
Why do they have high melting and boiling points?
The electrostatic forces between the positive ions and delocalised electrons are very strong and therefore require a lot of energy to overcome. Metals are nearly always solid at room temperature.
