solids Flashcards
1
Q
types of crystals
A
ionic, molecular, metallic, covalent-network
2
Q
ionic crystals
A
solids that form from the interaction of metal and non-metal ions (held by strong ionic bonds)
3
Q
molecular crystals
A
composed of individual molecules held by intermolecular forces
4
Q
metallic crystals
A
closely packed metal cations held together by a “sea” of free moving electrons (metallic bonds)
5
Q
electron sea theory
A
electrons move freely around positively charged nuclei
6
Q
covalent-network
A
solids where atoms form covalent bonds in an interwoven network
7
Q
ionic crystal properties
A
- high boiling/melting points
- conduct electricity when dissolved in water
- do not conduct in solid form
8
Q
molecular crystal properties
A
- lower boiling/melting points
- do not conduct electricity
9
Q
metallic crystal properties
A
- not all have the same properties
- can conducts electricity in solid from
10
Q
covalent-network crystal properties
A
- high boiling/melting points
- extreme hardness due to structure
- not good conductors
11
Q
carbon shapes
A
diamond, graphite, bucky ball, carbon nanotubes
