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C11 > Networks and Nanomaterials > Flashcards

Networks and Nanomaterials Flashcards

1
Q

Describe covalent network lattice

A

Strong covalent bonding exists in three dimensions

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2
Q

State what gives diamonds their characteristics malleability

A

3D lattice of covalently bonded carbon atoms

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3
Q

State how carbon atoms in diamond are arranged

A

Covalent network lattice

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4
Q

State how carbon atoms in silicon dioxide are arranged

A

Covalent network lattice

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5
Q

Outline 5 common properties of covalent network lattices

A
  1. strong 3D covalent bonding
  2. no free ions/electrons
  3. brittle (must be cut in a specific way or will shatter)
  4. chemically inert
  5. insoluble in water (and most other solvents)
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6
Q

State whether or not covalent network lattices possess free ions or electrons

A

No.

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7
Q

Describe what may occur if the bonding in a covalent network lattice breaks

A

Lattice becomes distorted

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8
Q

Outline the solubility of covalent network lattices in water

A

Insoluble

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9
Q

State whether or not covalent network lattices are soluble in most solvents

A

No

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10
Q

State how carbon atoms in graphite are arranged

A

Covalent layer lattice

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11
Q

Describe covalent layer lattices

A

Strong covalent bonding exists in two dimensions to form a layer

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12
Q

State what the layers in the covalent layer lattice are held together by

A

Weak dispersion forces

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13
Q

State how carbon atoms in buckyballs are arranged

A

Hollow sphere

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14
Q

State how carbon atoms in nanotubes are arranged

A

Sheets of hexagonally arranged carbon atoms formed into cylinders

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15
Q

Outline 1 major characteristic of covalent layer lattices

A

Delocalised electrons are able to move across lattice layers and allow for electrical conduction

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16
Q

Provide 3 examples of fullerenes

A
  1. buckyballs
  2. nanotubes
  3. graphene
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17
Q

Describe the strength of nanotubes in comparison to steel

A

100 times stronger than steel (with one fifth of the density)

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18
Q

State how carbon atoms in graphene are arranged

A

Flat layer of one-atom-thick carbon

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19
Q

State from which material graphene is obtained from

A

Graphite

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20
Q

State whether or not graphene conducts heat and electricity better than metal

A

Yes.

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21
Q

Describe the SA:V ratio of graphene

A

Very high SA:V which allows it to have close contact with other materials

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22
Q

Describe what characteristic of graphene allows it to readily combine to form composites
with surrounding polymers

A

Rippled surface

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23
Q

State 3 ways atoms can become stable

A
  1. giving electrons
  2. taking electrons
  3. sharing electrons
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24
Q

State what forms when metallic atoms combine

A

Metallic lattice

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25
State what forms when metallic and non-metallic atoms combine
Ionic lattice
26
State what forms when non-metallic atoms combine
Covalent lattice
27
State the 3 types of covalent lattices
1. covalent molecular lattice 2. covalent network lattice 3. covalent layer lattice
28
State what type of particles compose ionic lattices
- cations | - anions
29
State what types of particles compose covalent molecular lattices
- molecules
30
State what types of particles compose covalent network lattices
- atoms
31
State what types of particles compose covalent layer lattices
- atoms
32
State the 3 main types of bonding
1. ionic 2. metallic 3. covalent
33
State the 2 ways the bonding of a substance can be determined
1. substance properties | 2. composition of the substance
34
Describe the characteristic melting point of metallic lattices
High
35
Describe the characteristic melting point of ionic lattices
High
36
Describe the characteristics melting point of covalent molecular lattices
Low
37
Describe the characteristics melting point of covalent network lattices
Very high
38
Describe the characteristic melting point of covalent layer lattices
Very high
39
Describe the characteristics hardness of metallic lattices
Varies
40
Describe the characteristic hardness of ionic lattices
Hard
41
Describe the characteristic hardness of covalent molecular lattices
Soft
42
Describe the characteristic hardness of covalent network lattices
Hard
43
Describe the characteristic hardness of covalent layer lattices
Soft
44
Describe the characteristic electrical conductivity (in solid form) of metallic lattices
Good
45
Describe the characteristic electrical conductivity (in solid form) of ionic lattices
Poor
46
Describe the characteristics electrical conductivity (in solid form) of covalent molecular lattices
Poor
47
Describe the characteristic electrical conductivity (in solid form) of covalent network lattices
Poor
48
Describe the characteristic electrical conductivity (in solid form) of covalent layer lattices
Good
49
Describe the characteristic electrical conductivity (in liquid form) of metallic lattices
Good
50
Describe the characteristic electrical conductivity (in liquid form) of ionic lattices
Good
51
Describe the characteristic electrical conductivity (in liquid form) of covalent molecular lattices
Poor
52
Describe the characteristic electrical conductivity (in liquid form) of covalent network lattices
N/A
53
Describe the characteristic electrical conductivity (in liquid form) of covalent layer lattices
N/A
54
Describe the characteristic solubility of metallic lattices in water
Insoluble
55
Describe the characteristic solubility of ionic lattices in water
Most are soluble
56
Describe the characteristic solubility of covalent molecular lattices in water
Soluble if polar
57
Describe the characteristic solubility of covalent network lattices in water
Insoluble
58
Describe the characteristic solubility of covalent layer lattices in water
Insoluble
59
Describe the 3 classifications of substances
1. metal 2. non-metal 3. both metal and non-metal
60
State the name of a metallic lattice if the cations are identical
Pure metal
61
State the name of a metallic lattice if there is a mixture of cations
Alloy
62
State the 2 types of metallic lattices
1. pure metals | 2. alloys
63
State the 4 types of existence of non-metals
1. atom 2. molecule 3. covalent lattice 4. discrete atoms/molecules
64
State what 2 types of structures non-metals in a gaseous formation exist in
1. atom | 2. molecule
65
State what 2 types of structures non-metals in solid and liquid formation exist in
1. covalent lattice | 2. discrete atoms/molecules
66
State the 2 possible dimensions of covalent lattices
1. two dimensional | 2. three dimensional
67
Describe the 2 classifications of molecules
1. polar | 2. non-polar
68
Describe the 2 classifications of molecules
1. polar | 2. non-polar
69
State the covalent lattice with a two dimensional structure
Covalent layer lattice
70
State the covalent lattice with a three dimensional structure
Covalent network lattice
71
Provide the name of the state which atoms and molecules of non-metal substances exist
Gaseous
72
Provide the name of the state which covalent lattice and discrete atoms/molecules of non-metal substances exist
Solid or liquid

C11 (13 decks)

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