Topic 2 = Bonding Flashcards
Ionic bonding is between?
A metal and non metal
Covalent bonding is between?
non-metal and non-metal
metallic bonding is between?
metal and metal
Properties of ionic bonding
- Giant structure
- high melting and boiling point
- dissovles in water
- conducts when molten
properties of giant covalent bonding
- High melting and boiling point
- does not dissolve in water
- doesn’t conduct electricity except graphite
properties of simple molecular covalent bonding
- low melting and boiling point
- sometimes dissolves in water
- does not conduct electricity
properties of metallic bonding
- Giant structure
- high melting and boiling point
- doesn’t dissolve in water
- does conduct
Solid Diagram
- Very close together in a fixed position
- Vibrates
Liquid Diagram
- quite close together
- move past each other
Gas Diagram
- No fixed shape or volume
- Move randomly in all directions
- can be compressed
Properties of Diamond
- 4 covalent bonds
- very hard
- very high melting point
- does not conduct electricity
Properties of Graphite
- 3 covalent bonds
- soft-has layers
- very high melting point
- conducts electricity
Why does Diamond not conduct electricity?
The electrons are in a fixed place so cant carry electrical charge.
Why does graphite conduct electricity?
Only 3 covalent bonds so theres a free bond.so the delocalised electrons are in the layers.so it can carry charge.
Properties of Fullerenes
- High tensile strength
- Good conductor of electricity
- Unreactive
- Large surface area to volume ratio
Uses of fullerenes
- computer screens
- drug delievery in bodies
- lubricants
Graphene
Graphite-1 atom thick
- low density
- electrical conductor
- flexible
Advantages of nanoparticles
Medicine, Cosmetics, Catalysts
Disadvantages of nanoparticles
may be risks, more tests needed
