types of bonding Flashcards
1
Q
metallic bonding properties
A
- metals
- conducts electricity
- high melting and boiling points
2
Q
ionic bonding properties
A
- metal and non metal
- liquid/solution conducts electricity
- solid does not
- high mps and bps
3
Q
simple covalent bonding properties
A
- non metals, few atoms
- do not conduct electricity apart from graphite
- low mps and bps
4
Q
giant covalent bonding properties
A
- non metals, huge number of atoms (C)
- do not conduct electricity apart from graphite
- low mps and bps
5
Q
why do ionic and metallic bonded substances have high melting and boiling points?
A
they have strong electrostatic forces, meaning that lots of energy is needed to overcome the bonds
6
Q
why do covalently bonded substances have low melting and boiling points?
A
they have weak forces between the molecules
7
Q
WHY do some conduct electricity and others don’t?
(bonding topic)
refer to the electrons
A
metallic allows a flow of charge/current because of the delocalised electrons
ionic allows a flow of charge in liquid and solution but not in solid
covalent does not because its electrons are not free to move or carry current
8
Q
alloys
A
- a mixture of metals that have different sized atoms
- this makes it hard for the layers to slide
