Bonding Flashcards
1
Q
Why do ionic compounds have high MP?
A
MSEABOCIL
2
Q
electrical conductivity of ionic?
A
Conduct when molten but not solid (ions can move)
3
Q
Solubility of ionic?
A
Dissolve as water is polar so it pulls ions out of lattice
4
Q
What is a covalent bond?
A
Shared pair of electrons between 2 atoms
5
Q
What simple covalent compounds?
A
- Have simple molecular structure
- Atoms held by strong covalent bonds but molecules held together by weak intermolecular forces
6
Q
Structure of giant covalent?
A
Macromolecular
7
Q
describe graphite?
A
- hexagon sheets with weak vdws between sheets
- Each carbon forms 3 bonds, with 4th electron being delocalised (can conduct)
- sheets slide over each other - lubricant
- have low density (sports stuff)
- v high MP as MSCB (insoluble)
8
Q
Describe diamond?
A
- tetrahedral shape ( each carbon has 4 bonds)
- V high mp
- V hard (drills)
- Thermal conductor (vibrations travel through it)
- Doesn’t conduct
- Insoluble
9
Q
Behaviour of simple covalent?
A
- don’t conduct
- low MP
- will dissolve depending on how polar it is
10
Q
What is electronegativity?
A
The power of an atom to pull the bonding pair of electrons in a covalent bond towards itself
