Topic 2 Higher Flashcards
(10 cards)
1
Q
What are the limitations of particle theory ( the diagrams that show solids liquids and gases)
A
- they show all no forces between particles are shown
- particles as spheres
2
Q
When can ionic compounds conduct electricity?
A
When they are molten or aqueous
as the islands are free to move
3
Q
Why do giant ionic lattices have a high melting point
A
A lot of energy is required to overcome the many strong bonds
4
Q
Why do simple covalent compounds have low melting and boiling points?
A
- molecules are held together by intermolecular forces
- intermolecular forces are very weak
- very little energy is required to overcome
5
Q
What happens to the strength of intermolecular forces as the size of the atoms increases?
A
- the larger the molecule the stronger the intermolecular forces
6
Q
What is the structure of diamond?
A
- each carbon is bonded to 4 other carbons
- giant covalent lattice
7
Q
What is the structure of graphite?
A
- each carbon is bonded to 3 other carbons
- there is 1 delocalised electron per carbon atom
- the carbon atoms form layers
- there is no bonds between layers
8
Q
What are the uses of carbon nanotubes?
A
- electronics
- nanotechnology
- materials
9
Q
What is the special feature of nano particles
A
They have a big surface area to volume ratio as they are hollow
10
Q
What are the uses of nano particles?
A
- medicine ( drug transport)
- electronics
- sun dream
- deodorant
