1h Metallic bonding Flashcards
What is metallic bonding?
Metallic bonding is the electrostatic attraction between atoms and positively charged electrons
What is a metalic bond?
In a metal the atoms lose several of their outer electrons which drift around between the metal ions as delocalised electrons.
Atoms become positively charged because they lose electrons.
Electrostatic attraction between the delocalised electron and their positive ions
The large number of delocalised electrons makes all metals good conductors of electricity and heat.
The regular structure means the layers of atoms can fairly easily slide over each other without breaking the bonds and so metals are malleable.
What does malleable mean?
Positive ions are arranged in regular layers
What does conducts electricity mean?
Sea of delocalised electrons can move
What does strong mean?
There is a strong force of attraction between free electrons and metal ions
What does conducts heat mean?
Electrons can move and collide with other particles passing energy to each other
What does high boiling point mean?
There is a strong force of attraction between free electrons and metal ions
What does high melting point mean?
There is a strong force of attraction between free electrons and metal ions
What does alloys mean?
An alloys is a mixture of metals
What are metal alloys?
In alloys there are more than one type of atom, so they have different shapes. They are held together by strong bonds but in less regular structures. This means alloys are stronger but less malleable.
